USA: Iowa
Counties
The population of all counties in Iowa by census years.
| Name | Status | Population Census 1990-04-01 | Population Census 2000-04-01 | Population Census 2010-04-01 | Population Census 2020-04-01 | |
|---|---|---|---|---|---|---|
| Adair | County | 8,409 | 8,243 | 7,682 | 7,496 | → |
| Adams | County | 4,866 | 4,482 | 4,029 | 3,704 | → |
| Allamakee | County | 13,855 | 14,675 | 14,330 | 14,061 | → |
| Appanoose | County | 13,743 | 13,721 | 12,887 | 12,317 | → |
| Audubon | County | 7,334 | 6,830 | 6,119 | 5,674 | → |
| Benton | County | 22,429 | 25,308 | 26,076 | 25,575 | → |
| Black Hawk | County | 123,798 | 128,012 | 131,090 | 131,144 | → |
| Boone | County | 25,186 | 26,224 | 26,306 | 26,715 | → |
| Bremer | County | 22,813 | 23,325 | 24,276 | 24,988 | → |
| Buchanan | County | 20,844 | 21,093 | 20,958 | 20,565 | → |
| Buena Vista | County | 19,965 | 20,411 | 20,260 | 20,823 | → |
| Butler | County | 15,731 | 15,305 | 14,867 | 14,334 | → |
| Calhoun | County | 11,508 | 11,115 | 9,670 | 9,927 | → |
| Carroll | County | 21,423 | 21,421 | 20,816 | 20,760 | → |
| Cass | County | 15,128 | 14,684 | 13,956 | 13,127 | → |
| Cedar | County | 17,381 | 18,187 | 18,499 | 18,505 | → |
| Cerro Gordo | County | 46,733 | 46,447 | 44,151 | 43,127 | → |
| Cherokee | County | 14,098 | 13,035 | 12,072 | 11,658 | → |
| Chickasaw | County | 13,295 | 13,095 | 12,439 | 12,012 | → |
| Clarke | County | 8,287 | 9,133 | 9,286 | 9,748 | → |
| Clay | County | 17,585 | 17,372 | 16,667 | 16,384 | → |
| Clayton | County | 19,054 | 18,678 | 18,129 | 17,043 | → |
| Clinton | County | 51,040 | 50,149 | 49,116 | 46,460 | → |
| Crawford | County | 16,775 | 16,942 | 17,096 | 16,525 | → |
| Dallas | County | 29,755 | 40,750 | 66,135 | 99,678 | → |
| Davis | County | 8,312 | 8,541 | 8,753 | 9,110 | → |
| Decatur | County | 8,338 | 8,689 | 8,457 | 7,645 | → |
| Delaware | County | 18,035 | 18,404 | 17,764 | 17,488 | → |
| Des Moines | County | 42,614 | 42,351 | 40,325 | 38,910 | → |
| Dickinson | County | 14,909 | 16,424 | 16,667 | 17,703 | → |
| Dubuque | County | 86,403 | 89,143 | 93,653 | 99,266 | → |
| Emmet | County | 11,569 | 11,027 | 10,302 | 9,388 | → |
| Fayette | County | 21,843 | 22,008 | 20,880 | 19,509 | → |
| Floyd | County | 17,058 | 16,900 | 16,303 | 15,627 | → |
| Franklin | County | 11,364 | 10,704 | 10,680 | 10,019 | → |
| Fremont | County | 8,226 | 8,010 | 7,441 | 6,605 | → |
| Greene | County | 10,045 | 10,366 | 9,336 | 8,771 | → |
| Grundy | County | 12,029 | 12,369 | 12,453 | 12,329 | → |
| Guthrie | County | 10,935 | 11,353 | 10,954 | 10,623 | → |
| Hamilton | County | 16,071 | 16,438 | 15,673 | 15,039 | → |
| Hancock | County | 12,638 | 12,100 | 11,341 | 10,795 | → |
| Hardin | County | 19,094 | 18,812 | 17,534 | 16,878 | → |
| Harrison | County | 14,730 | 15,666 | 14,928 | 14,582 | → |
| Henry | County | 19,226 | 20,336 | 20,145 | 20,482 | → |
| Howard | County | 9,809 | 9,932 | 9,566 | 9,469 | → |
| Humboldt | County | 10,756 | 10,381 | 9,815 | 9,597 | → |
| Ida | County | 8,365 | 7,837 | 7,089 | 7,005 | → |
| Iowa | County | 14,630 | 15,671 | 16,355 | 16,662 | → |
| Jackson | County | 19,950 | 20,296 | 19,848 | 19,485 | → |
| Jasper | County | 34,795 | 37,213 | 36,842 | 37,813 | → |
| Jefferson | County | 16,310 | 16,181 | 16,843 | 15,663 | → |
| Johnson | County | 96,119 | 111,006 | 130,882 | 152,854 | → |
| Jones | County | 19,444 | 20,221 | 20,638 | 20,646 | → |
| Keokuk | County | 11,624 | 11,400 | 10,511 | 10,033 | → |
| Kossuth | County | 18,591 | 17,163 | 15,543 | 14,828 | → |
| Lee | County | 38,687 | 38,052 | 35,862 | 33,555 | → |
| Linn | County | 168,767 | 191,701 | 211,226 | 230,299 | → |
| Louisa | County | 11,592 | 12,183 | 11,387 | 10,837 | → |
| Lucas | County | 9,070 | 9,422 | 8,898 | 8,634 | → |
| Lyon | County | 11,952 | 11,763 | 11,581 | 11,934 | → |
| Madison | County | 12,483 | 14,019 | 15,679 | 16,548 | → |
| Mahaska | County | 21,522 | 22,335 | 22,381 | 22,190 | → |
| Marion | County | 30,001 | 32,052 | 33,309 | 33,414 | → |
| Marshall | County | 38,276 | 39,311 | 40,648 | 40,105 | → |
| Mills | County | 13,202 | 14,547 | 15,059 | 14,484 | → |
| Mitchell | County | 10,928 | 10,874 | 10,776 | 10,565 | → |
| Monona | County | 10,034 | 10,020 | 9,243 | 8,751 | → |
| Monroe | County | 8,114 | 8,016 | 7,970 | 7,577 | → |
| Montgomery | County | 12,076 | 11,771 | 10,740 | 10,330 | → |
| Muscatine | County | 39,907 | 41,722 | 42,745 | 43,235 | → |
| O'Brien | County | 15,444 | 15,102 | 14,398 | 14,182 | → |
| Osceola | County | 7,267 | 7,003 | 6,462 | 6,192 | → |
| Page | County | 16,870 | 16,976 | 15,932 | 15,211 | → |
| Palo Alto | County | 10,669 | 10,147 | 9,421 | 8,996 | → |
| Plymouth | County | 23,388 | 24,849 | 24,986 | 25,698 | → |
| Pocahontas | County | 9,525 | 8,662 | 7,310 | 7,078 | → |
| Polk | County | 327,140 | 374,601 | 430,640 | 492,401 | → |
| Pottawattamie | County | 82,628 | 87,704 | 93,158 | 93,667 | → |
| Poweshiek | County | 19,033 | 18,815 | 18,914 | 18,662 | → |
| Ringgold | County | 5,420 | 5,469 | 5,131 | 4,663 | → |
| Sac | County | 12,324 | 11,529 | 10,350 | 9,814 | → |
| Scott | County | 150,979 | 158,668 | 165,224 | 174,669 | → |
| Shelby | County | 13,230 | 13,173 | 12,167 | 11,746 | → |
| Sioux | County | 29,903 | 31,589 | 33,704 | 35,872 | → |
| Story | County | 74,252 | 79,981 | 89,542 | 98,537 | → |
| Tama | County | 17,419 | 18,103 | 17,767 | 17,135 | → |
| Taylor | County | 7,114 | 6,958 | 6,317 | 5,896 | → |
| Union | County | 12,750 | 12,309 | 12,534 | 12,138 | → |
| Van Buren | County | 7,676 | 7,809 | 7,570 | 7,203 | → |
| Wapello | County | 35,687 | 36,051 | 35,625 | 35,437 | → |
| Warren | County | 36,033 | 40,671 | 46,225 | 52,403 | → |
| Washington | County | 19,612 | 20,670 | 21,704 | 22,565 | → |
| Wayne | County | 7,067 | 6,730 | 6,403 | 6,497 | → |
| Webster | County | 40,342 | 40,235 | 38,013 | 36,999 | → |
| Winnebago | County | 12,122 | 11,723 | 10,866 | 10,679 | → |
| Winneshiek | County | 20,847 | 21,310 | 21,056 | 20,070 | → |
| Woodbury | County | 98,276 | 103,877 | 102,172 | 105,941 | → |
| Worth | County | 7,991 | 7,909 | 7,598 | 7,443 | → |
| Wright | County | 14,269 | 14,334 | 13,229 | 12,943 | → |
| Iowa | State | 2,776,755 | 2,926,324 | 3,046,355 | 3,190,369 |
Contents: Places
The population of all places in Iowa by census years.
icon links to further information about a selected place including its population structure (gender, age groups, age distribution, urbanization, »race«, ethnicity).| Name | Status | County | Population Census 1990-04-01 | Population Census 2000-04-01 | Population Census 2010-04-01 | Population Census 2020-04-01 | |
|---|---|---|---|---|---|---|---|
| Ackley | City | Hardin / Franklin | 1,701 | 1,807 | 1,587 | 1,597 | → |
| Ackworth | City | Warren | 99 | 60 | 105 | 117 | → |
| Adair | City | Adair / Guthrie | 894 | 837 | 781 | 794 | → |
| Adel | City | Dallas | 3,307 | 3,435 | 3,710 | 6,155 | → |
| Afton | City | Union | 953 | 903 | 860 | 868 | → |
| Agency | City | Wapello | 653 | 626 | 637 | 618 | → |
| Ainsworth | City | Washington | 510 | 523 | 567 | 509 | → |
| Akron | City | Plymouth | 1,450 | 1,475 | 1,517 | 1,554 | → |
| Albert City | City | Buena Vista | 779 | 709 | 699 | 680 | → |
| Albia | City | Monroe | 3,920 | 3,775 | 3,767 | 3,719 | → |
| Albion | City | Marshall | 585 | 594 | 505 | 451 | → |
| Alburnett | City | Linn | 456 | 561 | 673 | 674 | → |
| Alden | City | Hardin | 862 | 877 | 784 | 762 | → |
| Alexander | City | Franklin | 173 | 169 | 173 | 166 | → |
| Algona | City | Kossuth | 6,046 | 5,731 | 5,557 | 5,484 | → |
| Alleman | City | Polk | 345 | 447 | 427 | 433 | → |
| Allerton | City | Wayne | 608 | 552 | 503 | 430 | → |
| Allison | City | Butler | 947 | 1,010 | 1,025 | 964 | → |
| Alta | City | Buena Vista | 1,881 | 1,852 | 1,905 | 2,091 | → |
| Alta Vista | City | Chickasaw | 246 | 288 | 266 | 227 | → |
| Alton | City | Sioux | 1,103 | 1,117 | 1,227 | 1,244 | → |
| Altoona | City | Polk | 7,384 | 10,924 | 14,594 | 19,576 | → |
| Alvord | City | Lyon | 204 | 185 | 203 | 210 | → |
| Amana | Census-Designated Place | Iowa | 576 | 564 | 442 | 388 | → |
| Ames | City | Story | 47,483 | 50,812 | 59,035 | 66,426 | → |
| Anamosa | City | Jones | 5,108 | 5,484 | 5,537 | 5,442 | → |
| Anderson | Census-Designated Place | Fremont | ... | ... | 65 | 37 | → |
| Andover | City | Clinton | 103 | 84 | 103 | 108 | → |
| Andrew | City | Jackson | 327 | 464 | 430 | 381 | → |
| Anita | City | Cass | 1,078 | 1,058 | 977 | 966 | → |
| Ankeny | City | Polk | 18,604 | 27,520 | 45,602 | 67,901 | → |
| Anthon | City | Woodbury | 637 | 638 | 563 | 542 | → |
| Aplington | City | Butler | 1,087 | 1,056 | 1,130 | 1,111 | → |
| Arcadia | City | Carroll | 485 | 443 | 484 | 525 | → |
| Archer | City | O'Brien | 145 | 126 | 131 | 116 | → |
| Aredale | City | Butler | 93 | 88 | 74 | 60 | → |
| Argo | Census-Designated Place | Scott | ... | ... | ... | 44 | → |
| Argyle | Census-Designated Place | Lee | 111 | 79 | 42 | 91 | → |
| Arion | City | Crawford | 148 | 134 | 108 | 99 | → |
| Arispe | City | Union | 98 | 89 | 100 | 96 | → |
| Arlington | City | Fayette | 483 | 490 | 429 | 421 | → |
| Armstrong | City | Emmet | 1,036 | 980 | 928 | 871 | → |
| Arnolds Park | City | Dickinson | 976 | 1,198 | 1,125 | 1,107 | → |
| Arthur | City | Ida | 272 | 245 | 206 | 221 | → |
| Asbury | City | Dubuque | 2,049 | 2,454 | 4,393 | 5,948 | → |
| Ashton | City | Osceola | 462 | 460 | 458 | 452 | → |
| Aspinwall | City | Crawford | 53 | 58 | 40 | 35 | → |
| Atalissa | City | Muscatine | 359 | 308 | 311 | 298 | → |
| Athelstan | Census-Designated Place | Taylor | 31 | 18 | 19 | 6 | → |
| Atkins | City | Benton | 698 | 985 | 1,665 | 2,058 | → |
| Atlantic | City | Cass | 7,473 | 7,260 | 7,115 | 6,793 | → |
| Auburn | City | Sac | 283 | 296 | 322 | 263 | → |
| Audubon | City | Audubon | 2,561 | 2,373 | 2,170 | 2,056 | → |
| Augusta | Census-Designated Place | Des Moines | 73 | 85 | 79 | 51 | → |
| Aurelia | City | Cherokee | 1,028 | 1,062 | 1,036 | 970 | → |
| Aurora | City | Buchanan | 197 | 194 | 185 | 168 | → |
| Avoca | City | Pottawattamie | 1,513 | 1,609 | 1,506 | 1,685 | → |
| Ayrshire | City | Palo Alto | 195 | 200 | 148 | 128 | → |
| Badger | City | Webster | 585 | 614 | 561 | 524 | → |
| Bagley | City | Guthrie | 303 | 354 | 303 | 232 | → |
| Baldwin | City | Jackson | 137 | 121 | 113 | 99 | → |
| Balltown | City | Dubuque | 71 | 63 | 65 | 77 | → |
| Bancroft | City | Kossuth | 863 | 795 | 736 | 698 | → |
| Bankston | City | Dubuque | 39 | 27 | 25 | 24 | → |
| Barnes City | City | Mahaska / Poweshiek | 221 | 201 | 176 | 153 | → |
| Barnum | City | Webster | 174 | 198 | 191 | 177 | → |
| Bartlett | Census-Designated Place | Fremont | 15 | 39 | 50 | 5 | → |
| Bassett | City | Chickasaw | 54 | 66 | 67 | 44 | → |
| Batavia | City | Jefferson | 520 | 496 | 500 | 432 | → |
| Battle Creek | City | Ida | 822 | 742 | 713 | 698 | → |
| Baxter | City | Jasper | 941 | 1,052 | 1,101 | 966 | → |
| Bayard | City | Guthrie | 522 | 530 | 477 | 406 | → |
| Beacon | City | Mahaska | 521 | 546 | 494 | 435 | → |
| Beaconsfield | City | Ringgold | 27 | 11 | 15 | 15 | → |
| Beaman | City | Grundy | 183 | 210 | 191 | 157 | → |
| Beaver | City | Boone | 46 | 53 | 48 | 45 | → |
| Beaverdale | Census-Designated Place | Des Moines | 849 | 1,062 | 952 | 880 | → |
| Bedford | City | Taylor | 1,630 | 1,620 | 1,445 | 1,503 | → |
| Belle Plaine | City | Benton | 2,840 | 2,879 | 2,535 | 2,330 | → |
| Bellevue | City | Jackson | 2,312 | 2,358 | 2,208 | 2,362 | → |
| Belmond | City | Wright | 2,515 | 2,560 | 2,372 | 2,464 | → |
| Bennett | City | Cedar | 397 | 391 | 394 | 349 | → |
| Bentley | Census-Designated Place | Pottawattamie | 77 | 40 | 118 | 93 | → |
| Benton | City | Ringgold | 39 | 40 | 43 | 40 | → |
| Berkley | City | Boone | 39 | 24 | 32 | 22 | → |
| Bernard | City | Dubuque | 129 | 102 | 114 | 115 | → |
| Bertram | City | Linn | 222 | 677 | 279 | 269 | → |
| Bettendorf | City | Scott | 27,940 | 31,310 | 33,207 | 39,096 | → |
| Bevington | City | Madison / Warren | 56 | 61 | 63 | 57 | → |
| Big Rock | Census-Designated Place | Scott / Clinton | ... | ... | 16 | 49 | → |
| Birmingham | City | Van Buren | 387 | 425 | 448 | 370 | → |
| Blairsburg | City | Hamilton | 269 | 235 | 215 | 174 | → |
| Blairstown | City | Benton | 672 | 687 | 692 | 709 | → |
| Blakesburg | City | Wapello | 333 | 377 | 296 | 274 | → |
| Blanchard | City | Page | 67 | 59 | 38 | 29 | → |
| Blencoe | City | Monona | 258 | 227 | 224 | 232 | → |
| Blockton | City | Taylor | 213 | 186 | 192 | 125 | → |
| Bloomfield | City | Davis | 2,640 | 2,627 | 2,640 | 2,681 | → |
| Blue Grass | City | Scott / Muscatine | 1,212 | 1,178 | 1,454 | 1,667 | → |
| Bode | City | Humboldt | 339 | 337 | 302 | 307 | → |
| Bolan | Census-Designated Place | Worth | 22 | 23 | 33 | 32 | → |
| Bonaparte | City | Van Buren | 478 | 458 | 433 | 358 | → |
| Bondurant | City | Polk | 1,591 | 1,883 | 3,865 | 7,371 | → |
| Boone | City | Boone | 12,428 | 12,805 | 12,671 | 12,462 | → |
| Bouton | City | Dallas | 149 | 114 | 127 | 128 | → |
| Boxholm | City | Boone | 215 | 220 | 195 | 180 | → |
| Boyden | City | Sioux | 651 | 678 | 701 | 702 | → |
| Braddyville | City | Page | 174 | 173 | 160 | 145 | → |
| Bradford | Census-Designated Place | Franklin | 131 | 129 | 99 | 84 | → |
| Bradgate | City | Humboldt | 132 | 107 | 88 | 75 | → |
| Brandon | City | Buchanan | 336 | 313 | 323 | 335 | → |
| Brayton | City | Audubon | 125 | 143 | 128 | 143 | → |
| Breda | City | Carroll | 467 | 479 | 483 | 498 | → |
| Bridgewater | City | Adair | 226 | 178 | 176 | 148 | → |
| Brighton | City | Washington | 684 | 683 | 658 | 601 | → |
| Bristow | City | Butler | 197 | 202 | 160 | 144 | → |
| Britt | City | Hancock | 2,191 | 2,058 | 2,069 | 2,046 | → |
| Bronson | City | Woodbury | 217 | 263 | 322 | 299 | → |
| Brooklyn | City | Poweshiek | 1,442 | 1,372 | 1,475 | 1,499 | → |
| Brunsville | City | Plymouth | 137 | 146 | 151 | 128 | → |
| Buck Grove | City | Crawford | 62 | 49 | 44 | 31 | → |
| Buckeye | City | Hardin | 101 | 110 | 112 | 84 | → |
| Buffalo | City | Scott | 1,299 | 1,372 | 1,268 | 1,181 | → |
| Buffalo Center | City | Winnebago | 1,073 | 971 | 906 | 859 | → |
| Burchinal | Census-Designated Place | Cerro Gordo | 75 | 59 | 40 | 33 | → |
| Burlington | City | Des Moines | 27,433 | 26,854 | 25,592 | 23,985 | → |
| Burr Oak | Census-Designated Place | Winneshiek | 95 | 129 | 166 | 171 | → |
| Burt | City | Kossuth | 589 | 557 | 532 | 418 | → |
| Bussey | City | Marion | 501 | 455 | 422 | 380 | → |
| Calamus | City | Clinton | 382 | 396 | 439 | 354 | → |
| California Junction | Census-Designated Place | Harrison | 48 | 70 | 85 | 74 | → |
| Callender | City | Webster | 389 | 428 | 374 | 370 | → |
| Calmar | City | Winneshiek | 1,035 | 1,028 | 990 | 1,127 | → |
| Calumet | City | O'Brien | 160 | 182 | 170 | 147 | → |
| Camanche | City | Clinton | 4,452 | 4,198 | 4,448 | 4,573 | → |
| Cambridge | City | Story | 723 | 823 | 827 | 831 | → |
| Cantril | City | Van Buren | 271 | 260 | 222 | 221 | → |
| Carbon | City | Adams | 60 | 27 | 34 | 32 | → |
| Carlisle | City | Polk / Warren | 3,491 | 3,583 | 3,886 | 4,159 | → |
| Carpenter | City | Mitchell | 102 | 130 | 109 | 89 | → |
| Carroll | City | Carroll | 9,483 | 10,120 | 10,128 | 10,318 | → |
| Carson | City | Pottawattamie | 710 | 670 | 810 | 766 | → |
| Carter Lake | City | Pottawattamie | 3,197 | 3,250 | 3,785 | 3,792 | → |
| Cascade | City | Dubuque / Jones | 1,816 | 1,997 | 2,171 | 2,389 | → |
| Casey | City | Guthrie / Adair | 441 | 475 | 426 | 385 | → |
| Castalia | City | Winneshiek | 191 | 179 | 173 | 145 | → |
| Castana | City | Monona | 159 | 178 | 142 | 105 | → |
| Cedar Falls | City | Black Hawk | 34,017 | 36,158 | 39,284 | 40,727 | → |
| Cedar Rapids | City | Linn | 109,709 | 121,135 | 126,609 | 137,723 | → |
| Center Junction | Census-Designated Place | Jones | 169 | 135 | 111 | 100 | → |
| Center Point | City | Linn | 1,702 | 1,998 | 2,422 | 2,586 | → |
| Centerville | City | Appanoose | 5,976 | 5,948 | 5,631 | 5,421 | → |
| Central City | City | Linn | 1,067 | 1,161 | 1,265 | 1,266 | → |
| Centralia | City | Dubuque | 121 | 109 | 123 | 116 | → |
| Chapin | Census-Designated Place | Franklin | 115 | 86 | 87 | 71 | → |
| Chariton | City | Lucas | 4,639 | 4,615 | 4,321 | 4,194 | → |
| Charles City | City | Floyd | 7,906 | 7,803 | 7,654 | 7,398 | → |
| Charlotte | City | Clinton | 371 | 426 | 394 | 390 | → |
| Charter Oak | City | Crawford | 498 | 532 | 503 | 533 | → |
| Chatsworth | City | Sioux | 103 | 89 | 79 | 73 | → |
| Chelsea | City | Tama | 338 | 288 | 267 | 226 | → |
| Cherokee | City | Cherokee | 6,049 | 5,356 | 5,253 | 5,199 | → |
| Chester | City | Howard | 158 | 149 | 127 | 137 | → |
| Chillicothe | City | Wapello | 119 | 90 | 97 | 76 | → |
| Churdan | City | Greene | 423 | 417 | 392 | 367 | → |
| Cincinnati | City | Appanoose | 363 | 427 | 357 | 288 | → |
| Clare | City | Webster | 162 | 189 | 146 | 134 | → |
| Clarence | City | Cedar | 938 | 1,007 | 974 | 1,039 | → |
| Clarinda | City | Page | 5,011 | 5,693 | 5,581 | 5,373 | → |
| Clarion | City | Wright | 2,705 | 2,974 | 2,850 | 2,810 | → |
| Clarksville | City | Butler | 1,386 | 1,440 | 1,439 | 1,263 | → |
| Clayton | City | Clayton | 41 | 60 | 41 | 46 | → |
| Clear Lake | City | Cerro Gordo | 8,602 | 8,172 | 7,787 | 7,680 | → |
| Clearfield | City | Taylor / Ringgold | 399 | 380 | 367 | 279 | → |
| Cleghorn | City | Cherokee | 243 | 219 | 237 | 238 | → |
| Clemons | City | Marshall | 173 | 148 | 148 | 138 | → |
| Clermont | City | Fayette | 594 | 720 | 634 | 579 | → |
| Climbing Hill | Census-Designated Place | Woodbury | 86 | 113 | 97 | 97 | → |
| Clinton | City | Clinton | 29,254 | 27,774 | 26,873 | 24,467 | → |
| Clio | City | Wayne | 103 | 91 | 80 | 66 | → |
| Clive | City | Polk / Dallas | 7,620 | 12,809 | 15,415 | 18,601 | → |
| Clutier | City | Tama | 219 | 229 | 213 | 214 | → |
| Coalville | Census-Designated Place | Webster | 360 | 591 | 610 | 651 | → |
| Coburg | City | Montgomery | 72 | 31 | 42 | 28 | → |
| Coggon | City | Linn | 644 | 727 | 672 | 705 | → |
| Coin | City | Page | 266 | 246 | 193 | 177 | → |
| Colesburg | City | Delaware | 409 | 414 | 399 | 386 | → |
| Colfax | City | Jasper | 2,451 | 2,300 | 2,090 | 2,256 | → |
| College Springs | City | Page | 231 | 237 | 216 | 172 | → |
| Collins | City | Story | 459 | 499 | 495 | 495 | → |
| Colo | City | Story | 776 | 878 | 876 | 848 | → |
| Columbus City | City | Louisa | 325 | 373 | 392 | 389 | → |
| Columbus Junction | City | Louisa | 1,616 | 1,753 | 1,873 | 1,834 | → |
| Colwell | City | Floyd | 94 | 80 | 73 | 54 | → |
| Conesville | City | Muscatine | 363 | 424 | 432 | 353 | → |
| Conrad | City | Grundy | 964 | 1,051 | 1,105 | 1,095 | → |
| Conroy | Census-Designated Place | Iowa | 88 | 72 | 259 | 252 | → |
| Conway | City | Taylor | 53 | 63 | 41 | 16 | → |
| Coon Rapids | City | Carroll / Guthrie | 1,315 | 1,305 | 1,305 | 1,305 | → |
| Coppock | City | Washington / Henry / Jefferson | 50 | 51 | 47 | 39 | → |
| Coralville | City | Johnson | 10,874 | 15,192 | 18,917 | 22,330 | → |
| Corley | Census-Designated Place | Shelby | ... | ... | 26 | 31 | → |
| Corning | City | Adams | 1,831 | 1,804 | 1,636 | 1,569 | → |
| Correctionville | City | Woodbury | 924 | 847 | 821 | 763 | → |
| Corwith | City | Hancock | 354 | 360 | 305 | 270 | → |
| Corydon | City | Wayne | 1,700 | 1,596 | 1,587 | 1,521 | → |
| Cotter | City | Louisa | 50 | 55 | 44 | 39 | → |
| Coulter | City | Franklin | 253 | 263 | 281 | 220 | → |
| Council Bluffs | City | Pottawattamie | 54,825 | 58,269 | 62,213 | 62,792 | → |
| Craig | City | Plymouth | 99 | 102 | 91 | 77 | → |
| Crawfordsville | City | Washington | 265 | 292 | 264 | 278 | → |
| Crescent | City | Pottawattamie | 254 | 481 | 617 | 627 | → |
| Cresco | City | Howard | 3,728 | 3,920 | 3,864 | 3,893 | → |
| Creston | City | Union | 7,920 | 7,615 | 7,834 | 7,544 | → |
| Cromwell | City | Union | 120 | 121 | 107 | 106 | → |
| Crystal Lake | City | Hancock | 271 | 288 | 250 | 253 | → |
| Cumberland | City | Cass | 295 | 281 | 262 | 247 | → |
| Cumming | City | Warren | 161 | 160 | 347 | 432 | → |
| Curlew | City | Palo Alto | 56 | 61 | 58 | 39 | → |
| Cushing | City | Woodbury | 241 | 246 | 220 | 230 | → |
| Cylinder | City | Palo Alto | 112 | 110 | 90 | 87 | → |
| Dakota City | City | Humboldt | 1,076 | 897 | 839 | 759 | → |
| Dallas Center | City | Dallas | 1,458 | 1,592 | 1,627 | 1,901 | → |
| Dana | City | Greene | 71 | 84 | 71 | 35 | → |
| Danbury | City | Woodbury | 430 | 384 | 349 | 320 | → |
| Danville | City | Des Moines | 947 | 918 | 934 | 924 | → |
| Davenport | City | Scott | 95,718 | 98,298 | 99,697 | 101,728 | → |
| Davis City | City | Decatur | 257 | 274 | 207 | 179 | → |
| Dawson | City | Dallas | 174 | 155 | 131 | 113 | → |
| Dayton | City | Webster | 822 | 888 | 837 | 774 | → |
| De Soto | City | Dallas | 1,041 | 1,006 | 1,044 | 916 | → |
| Decatur City | City | Decatur | 177 | 199 | 197 | 177 | → |
| Decorah | City | Winneshiek | 8,097 | 8,211 | 8,133 | 7,581 | → |
| Dedham | City | Carroll | 267 | 281 | 262 | 223 | → |
| Deep River | City | Poweshiek | 345 | 286 | 281 | 251 | → |
| Defiance | City | Shelby | 313 | 350 | 284 | 249 | → |
| Delaware | City | Delaware | 186 | 195 | 159 | 140 | → |
| Delhi | City | Delaware | 521 | 460 | 460 | 415 | → |
| Delmar | City | Clinton | 521 | 504 | 525 | 546 | → |
| Deloit | City | Crawford | 310 | 280 | 264 | 249 | → |
| Delphos | Census-Designated Place | Ringgold | 23 | 25 | 25 | 26 | → |
| Delta | City | Keokuk | 409 | 412 | 328 | 262 | → |
| Denison | City | Crawford | 6,651 | 7,355 | 8,296 | 8,373 | → |
| Denmark | Census-Designated Place | Lee | 377 | 428 | 423 | 425 | → |
| Denver | City | Bremer | 1,604 | 1,645 | 1,766 | 1,919 | → |
| Derby | City | Lucas | 135 | 131 | 115 | 90 | → |
| Des Moines | City | Polk / Warren | 193,459 | 199,173 | 204,216 | 214,125 | → |
| DeWitt | City | Clinton | 4,503 | 5,061 | 5,326 | 5,516 | → |
| Dexter | City | Dallas | 630 | 694 | 603 | 639 | → |
| Diagonal | City | Ringgold | 298 | 312 | 330 | 339 | → |
| Diamondhead Lake | Census-Designated Place | Guthrie | 244 | 301 | 366 | 371 | → |
| Dickens | City | Clay | 214 | 200 | 185 | 148 | → |
| Dike | City | Grundy | 877 | 952 | 1,209 | 1,301 | → |
| Dixon | City | Scott | 228 | 267 | 243 | 202 | → |
| Dolliver | City | Emmet | 103 | 77 | 66 | 65 | → |
| Donahue | City | Scott | 313 | 296 | 356 | 330 | → |
| Donnellson | City | Lee | 948 | 973 | 906 | 885 | → |
| Doon | City | Lyon | 622 | 534 | 582 | 618 | → |
| Douds | Census-Designated Place | Van Buren | 103 | 165 | 152 | 156 | → |
| Dougherty | City | Cerro Gordo | 107 | 79 | 58 | 65 | → |
| Dow City | City | Crawford | 443 | 507 | 499 | 484 | → |
| Downey | Census-Designated Place | Cedar | 81 | 79 | 56 | 112 | → |
| Dows | City | Wright / Franklin | 694 | 682 | 542 | 527 | → |
| Drakesville | City | Davis | 172 | 197 | 184 | 164 | → |
| Dubuque | City | Dubuque | 57,860 | 57,856 | 57,605 | 59,669 | → |
| Dumont | City | Butler | 700 | 678 | 637 | 637 | → |
| Duncan | Census-Designated Place | Hancock | ... | 96 | 131 | 57 | → |
| Duncombe | City | Webster | 480 | 474 | 412 | 381 | → |
| Dundee | City | Delaware | 175 | 181 | 168 | 195 | → |
| Dunkerton | City | Black Hawk | 741 | 771 | 863 | 840 | → |
| Dunlap | City | Harrison | 1,276 | 1,144 | 1,042 | 1,042 | → |
| Durango | City | Dubuque | 30 | 25 | 24 | 21 | → |
| Durant | City | Cedar / Scott / Muscatine | 1,556 | 1,674 | 1,869 | 1,874 | → |
| Dyersville | City | Dubuque / Delaware | 3,750 | 4,050 | 4,076 | 4,478 | → |
| Dysart | City | Tama | 1,229 | 1,302 | 1,379 | 1,283 | → |
| Eagle Grove | City | Wright | 3,671 | 3,718 | 3,581 | 3,601 | → |
| Earlham | City | Madison | 1,161 | 1,298 | 1,443 | 1,410 | → |
| Earling | City | Shelby | 467 | 463 | 441 | 396 | → |
| Earlville | City | Delaware | 869 | 892 | 806 | 719 | → |
| Early | City | Sac | 632 | 605 | 556 | 589 | → |
| East Amana | Census-Designated Place | Iowa | 25 | 25 | 56 | 64 | → |
| East Peru | City | Madison | 132 | 155 | 123 | 113 | → |
| Eddyville | City | Wapello / Mahaska / Monroe | 1,042 | 1,064 | 1,027 | 970 | → |
| Edgewood | City | Delaware / Clayton | 867 | 923 | 867 | 909 | → |
| Elberon | City | Tama | 203 | 245 | 196 | 181 | → |
| Eldon | City | Wapello | 1,064 | 1,004 | 931 | 788 | → |
| Eldora | City | Hardin | 3,054 | 3,037 | 2,730 | 2,659 | → |
| Eldridge | City | Scott | 3,556 | 4,165 | 5,650 | 6,721 | → |
| Elgin | City | Fayette | 654 | 683 | 682 | 687 | → |
| Elk Horn | City | Shelby | 672 | 649 | 659 | 600 | → |
| Elk Run Heights | City | Black Hawk | 1,144 | 1,114 | 1,116 | 1,069 | → |
| Elkader | City | Clayton | 1,514 | 1,446 | 1,292 | 1,212 | → |
| Elkhart | City | Polk | 381 | 362 | 678 | 877 | → |
| Elkport | City | Clayton | 82 | 118 | 36 | 28 | → |
| Elliott | City | Montgomery | 401 | 402 | 350 | 339 | → |
| Ellston | City | Ringgold | 44 | 57 | 41 | 22 | → |
| Ellsworth | City | Hamilton | 451 | 532 | 527 | 506 | → |
| Elma | City | Howard | 657 | 601 | 546 | 505 | → |
| Ely | City | Linn | 542 | 1,159 | 1,781 | 2,326 | → |
| Emerson | City | Mills | 467 | 481 | 437 | 400 | → |
| Emmetsburg | City | Palo Alto | 3,977 | 3,971 | 3,904 | 3,698 | → |
| Epworth | City | Dubuque | 1,317 | 1,442 | 1,864 | 2,018 | → |
| Essex | City | Page | 918 | 884 | 798 | 726 | → |
| Estherville | City | Emmet | 6,775 | 6,652 | 6,364 | 5,898 | → |
| Evansdale | City | Black Hawk | 4,677 | 4,525 | 4,752 | 4,565 | → |
| Everly | City | Clay | 739 | 642 | 591 | 575 | → |
| Exira | City | Audubon | 984 | 810 | 840 | 789 | → |
| Exline | City | Appanoose | 187 | 196 | 160 | 161 | → |
| Fairbank | City | Buchanan / Fayette | 1,035 | 1,043 | 1,117 | 1,109 | → |
| Fairfax | City | Linn | 834 | 886 | 2,160 | 2,836 | → |
| Fairfield | City | Jefferson | 10,148 | 9,660 | 9,480 | 9,423 | → |
| Fairport | Census-Designated Place | Muscatine | 184 | 70 | 81 | 204 | → |
| Farley | City | Dubuque | 1,339 | 1,355 | 1,532 | 1,770 | → |
| Farmersburg | City | Clayton | 291 | 300 | 302 | 272 | → |
| Farmington | City | Van Buren | 688 | 755 | 663 | 583 | → |
| Farnhamville | City | Calhoun / Webster | 414 | 434 | 371 | 382 | → |
| Farragut | City | Fremont | 498 | 484 | 489 | 488 | → |
| Fayette | City | Fayette | 1,340 | 1,356 | 1,333 | 1,255 | → |
| Fenton | City | Kossuth | 347 | 317 | 279 | 267 | → |
| Ferguson | City | Marshall | 176 | 128 | 126 | 98 | → |
| Fertile | City | Worth | 382 | 357 | 370 | 306 | → |
| Floris | City | Davis | 180 | 149 | 138 | 116 | → |
| Floyd | City | Floyd | 332 | 364 | 335 | 311 | → |
| Fonda | City | Pocahontas | 743 | 642 | 622 | 637 | → |
| Fontanelle | City | Adair | 779 | 687 | 671 | 683 | → |
| Forest City | City | Winnebago / Hancock | 4,463 | 4,397 | 4,151 | 4,281 | → |
| Fort Atkinson | City | Winneshiek | 369 | 398 | 347 | 310 | → |
| Fort Dodge | City | Webster | 26,238 | 26,295 | 25,203 | 24,871 | → |
| Fort Madison | City | Lee | 11,716 | 10,949 | 11,083 | 10,324 | → |
| Fostoria | City | Clay | 152 | 217 | 243 | 232 | → |
| Franklin | City | Lee | 143 | 136 | 145 | 129 | → |
| Fraser | City | Boone | 120 | 137 | 98 | 102 | → |
| Fredericksburg | City | Chickasaw | 1,014 | 978 | 941 | 990 | → |
| Frederika | City | Bremer | 192 | 197 | 195 | 203 | → |
| Fredonia | City | Louisa | 194 | 247 | 226 | 220 | → |
| Fremont | City | Mahaska | 701 | 733 | 746 | 692 | → |
| Fruitland | City | Muscatine | 454 | 714 | 973 | 962 | → |
| Frytown | Census-Designated Place | Johnson | 82 | 93 | 165 | 193 | → |
| Galt | City | Wright | 43 | 30 | 32 | 23 | → |
| Galva | City | Ida | 402 | 368 | 439 | 435 | → |
| Garber | City | Clayton | 118 | 105 | 88 | 77 | → |
| Garden City | Census-Designated Place | Hardin | 129 | 107 | 89 | 100 | → |
| Garden Grove | City | Decatur | 229 | 250 | 209 | 172 | → |
| Garnavillo | City | Clayton | 756 | 749 | 748 | 758 | → |
| Garner | City | Hancock | 2,924 | 2,928 | 3,139 | 3,062 | → |
| Garrison | City | Benton | 320 | 413 | 371 | 345 | → |
| Garwin | City | Tama | 533 | 565 | 527 | 482 | → |
| Geneva | City | Franklin | 174 | 169 | 165 | 135 | → |
| George | City | Lyon | 1,068 | 1,050 | 1,080 | 1,081 | → |
| Gibson | City | Keokuk | 63 | 89 | 61 | 62 | → |
| Gilbert | City | Story | 796 | 999 | 1,076 | 1,211 | → |
| Gilbertville | City | Black Hawk | 748 | 773 | 720 | 790 | → |
| Gillett Grove | City | Clay | 67 | 57 | 49 | 33 | → |
| Gilman | City | Marshall | 563 | 599 | 509 | 544 | → |
| Gilmore City | City | Humboldt / Pocahontas | 562 | 550 | 504 | 484 | → |
| Gladbrook | City | Tama | 881 | 1,014 | 945 | 800 | → |
| Glenwood | City | Mills | 5,145 | 5,415 | 5,268 | 5,073 | → |
| Glidden | City | Carroll | 1,101 | 1,128 | 1,146 | 1,153 | → |
| Goldfield | City | Wright | 710 | 678 | 634 | 636 | → |
| Goodell | City | Hancock | 199 | 174 | 139 | 142 | → |
| Goose Lake | City | Clinton | 230 | 227 | 240 | 250 | → |
| Gowrie | City | Webster | 1,019 | 1,038 | 1,037 | 954 | → |
| Graettinger | City | Palo Alto | 822 | 904 | 827 | 833 | → |
| Graf | City | Dubuque | ... | 77 | 79 | 75 | → |
| Grafton | City | Worth | 287 | 290 | 252 | 217 | → |
| Grand Junction | City | Greene | 808 | 968 | 818 | 726 | → |
| Grand Mound | City | Clinton | 619 | 678 | 642 | 621 | → |
| Grand River | City | Decatur | 174 | 205 | 238 | 195 | → |
| Grandview | City | Louisa | 528 | 614 | 552 | 443 | → |
| Granger | City | Dallas / Polk | 671 | 606 | 1,250 | 1,650 | → |
| Grant | City | Montgomery | 123 | 99 | 92 | 86 | → |
| Granville | City | Sioux | 396 | 325 | 312 | 311 | → |
| Gravity | City | Taylor | 216 | 218 | 188 | 155 | → |
| Gray | City | Audubon | 83 | 82 | 63 | 62 | → |
| Greeley | City | Delaware | 286 | 285 | 256 | 217 | → |
| Green Mountain | Census-Designated Place | Marshall | 166 | 168 | 126 | 113 | → |
| Greene | City | Butler / Floyd | 1,152 | 1,105 | 1,130 | 993 | → |
| Greenfield | City | Adair | 2,072 | 2,127 | 1,988 | 2,062 | → |
| Greenville | City | Clay | 84 | 94 | 75 | 66 | → |
| Grimes | City | Polk / Dallas | 2,682 | 5,121 | 8,313 | 15,397 | → |
| Grinnell | City | Poweshiek | 9,073 | 9,120 | 9,221 | 9,554 | → |
| Griswold | City | Cass | 1,049 | 1,033 | 1,038 | 995 | → |
| Grundy Center | City | Grundy | 2,530 | 2,594 | 2,704 | 2,800 | → |
| Gruver | City | Emmet | 102 | 113 | 93 | 63 | → |
| Guernsey | City | Poweshiek | 70 | 66 | 65 | 62 | → |
| Guthrie Center | City | Guthrie | 1,669 | 1,663 | 1,559 | 1,589 | → |
| Guttenberg | City | Clayton | 2,308 | 2,000 | 1,926 | 1,814 | → |
| Halbur | City | Carroll | 225 | 205 | 246 | 274 | → |
| Hamburg | City | Fremont | 1,251 | 1,247 | 1,208 | 894 | → |
| Hamilton | City | Marion | 115 | 142 | 130 | 124 | → |
| Hampton | City | Franklin | 4,350 | 4,222 | 4,465 | 4,339 | → |
| Hancock | City | Pottawattamie | 201 | 207 | 196 | 201 | → |
| Hanlontown | City | Worth | 193 | 232 | 226 | 205 | → |
| Hansell | City | Franklin | 83 | 101 | 94 | 83 | → |
| Harcourt | City | Webster | 301 | 340 | 303 | 263 | → |
| Hardy | City | Humboldt | 47 | 57 | 47 | 54 | → |
| Harlan | City | Shelby | 5,212 | 5,295 | 5,082 | 4,894 | → |
| Harper | City | Keokuk | 151 | 134 | 114 | 120 | → |
| Harpers Ferry | City | Allamakee | 304 | 328 | 329 | 258 | → |
| Harris | City | Osceola | 176 | 200 | 170 | 151 | → |
| Hartford | City | Warren | 770 | 759 | 777 | 733 | → |
| Hartley | City | O'Brien | 1,653 | 1,738 | 1,672 | 1,606 | → |
| Hartwick | City | Poweshiek | 119 | 83 | 86 | 92 | → |
| Harvey | City | Marion | 241 | 277 | 235 | 234 | → |
| Hastings | City | Mills | 202 | 219 | 152 | 155 | → |
| Havelock | City | Pocahontas | 217 | 179 | 133 | 129 | → |
| Haverhill | City | Marshall | 151 | 170 | 173 | 166 | → |
| Hawarden | City | Sioux | 2,436 | 2,481 | 2,532 | 2,698 | → |
| Hawkeye | City | Fayette | 479 | 497 | 449 | 437 | → |
| Hayesville | City | Keokuk | 62 | 57 | 49 | 44 | → |
| Hayfield | Census-Designated Place | Hancock | 55 | 56 | 43 | 41 | → |
| Hazleton | City | Buchanan | 736 | 948 | 831 | 709 | → |
| Hedrick | City | Keokuk | 826 | 846 | 765 | 731 | → |
| Henderson | City | Mills | 206 | 169 | 185 | 142 | → |
| Hepburn | City | Page | 41 | 39 | 18 | 23 | → |
| Hiawatha | City | Linn | 5,341 | 6,538 | 7,022 | 7,183 | → |
| High Amana | Census-Designated Place | Iowa | 49 | 42 | 115 | 113 | → |
| Hills | City | Johnson | 662 | 675 | 702 | 858 | → |
| Hillsboro | City | Henry | 177 | 193 | 178 | 162 | → |
| Hinton | City | Plymouth | 697 | 788 | 956 | 934 | → |
| Holiday Lake | Census-Designated Place | Poweshiek | 336 | 498 | 433 | 473 | → |
| Holland | City | Grundy | 215 | 250 | 290 | 269 | → |
| Holstein | City | Ida | 1,453 | 1,469 | 1,397 | 1,499 | → |
| Holy Cross | City | Dubuque | 293 | 339 | 374 | 358 | → |
| Homestead | Census-Designated Place | Iowa | 60 | 55 | 148 | 135 | → |
| Hopkinton | City | Delaware | 709 | 683 | 640 | 622 | → |
| Hornick | City | Woodbury | 227 | 248 | 223 | 258 | → |
| Hospers | City | Sioux | 635 | 672 | 698 | 720 | → |
| Houghton | City | Lee | 129 | 132 | 146 | 138 | → |
| Hubbard | City | Hardin | 814 | 830 | 843 | 861 | → |
| Hudson | City | Black Hawk | 2,024 | 2,105 | 2,284 | 2,543 | → |
| Hull | City | Sioux | 1,716 | 1,972 | 2,178 | 2,379 | → |
| Humboldt | City | Humboldt | 4,395 | 4,465 | 4,684 | 4,786 | → |
| Humeston | City | Wayne | 564 | 547 | 481 | 462 | → |
| Hutchins | Census-Designated Place | Hancock | ... | 31 | 28 | 22 | → |
| Huxley | City | Story | 2,073 | 2,328 | 3,317 | 4,249 | → |
| Ida Grove | City | Ida | 2,386 | 2,351 | 2,144 | 2,053 | → |
| Imogene | City | Fremont | 76 | 66 | 72 | 38 | → |
| Independence | City | Buchanan | 6,054 | 5,973 | 5,967 | 6,064 | → |
| Indianola | City | Warren | 11,404 | 13,169 | 14,777 | 15,836 | → |
| Inwood | City | Lyon | 790 | 872 | 814 | 928 | → |
| Ionia | City | Chickasaw | 324 | 280 | 290 | 229 | → |
| Iowa City | City | Johnson | 59,745 | 62,356 | 67,963 | 74,823 | → |
| Iowa Falls | City | Hardin | 5,469 | 5,189 | 5,280 | 5,102 | → |
| Ireton | City | Sioux | 606 | 586 | 610 | 588 | → |
| Irvington | Census-Designated Place | Kossuth | 29 | 27 | 38 | 36 | → |
| Irwin | City | Shelby | 394 | 372 | 341 | 320 | → |
| Jackson Junction | City | Winneshiek | 89 | 60 | 59 | 38 | → |
| Jacksonville | Census-Designated Place | Shelby | 16 | 11 | 30 | 29 | → |
| Jamaica | City | Guthrie | 232 | 237 | 224 | 194 | → |
| Janesville | City | Bremer / Black Hawk | 846 | 827 | 930 | 1,038 | → |
| Jefferson | City | Greene | 4,366 | 4,628 | 4,345 | 4,184 | → |
| Jesup | City | Buchanan / Black Hawk | 2,125 | 2,206 | 2,522 | 2,512 | → |
| Jewell Junction | City | Hamilton | 1,122 | 1,239 | 1,215 | 1,213 | → |
| Johnston | City | Polk | 4,934 | 8,912 | 17,278 | 24,058 | → |
| Joice | City | Worth | 245 | 231 | 217 | 211 | → |
| Jolley | City | Calhoun | 56 | 52 | 39 | 28 | → |
| Kalona | City | Washington | 1,996 | 2,301 | 2,373 | 2,634 | → |
| Kamrar | City | Hamilton | 208 | 229 | 199 | 184 | → |
| Kanawha | City | Hancock | 772 | 739 | 652 | 654 | → |
| Kellerton | City | Ringgold | 314 | 372 | 314 | 241 | → |
| Kelley | City | Story | 246 | 302 | 309 | 305 | → |
| Kellogg | City | Jasper | 708 | 611 | 599 | 602 | → |
| Kensett | City | Worth | 302 | 286 | 259 | 258 | → |
| Kent | Census-Designated Place | Union | 64 | 52 | 61 | 37 | → |
| Kent Estates | Census-Designated Place | Muscatine | 774 | 1,255 | 1,782 | 2,074 | → |
| Keokuk | City | Lee | 12,604 | 11,400 | 10,776 | 9,905 | → |
| Keomah Village | City | Mahaska | 99 | 88 | 98 | 111 | → |
| Keosauqua | City | Van Buren | 1,022 | 1,069 | 1,006 | 935 | → |
| Keota | City | Keokuk / Washington | 1,000 | 1,024 | 1,011 | 897 | → |
| Keswick | City | Keokuk | 284 | 295 | 246 | 243 | → |
| Keystone | City | Benton | 568 | 687 | 622 | 602 | → |
| Kimballton | City | Audubon | 288 | 342 | 322 | 291 | → |
| Kingsley | City | Plymouth | 1,129 | 1,250 | 1,411 | 1,405 | → |
| Kingston | Census-Designated Place | Des Moines | 98 | 79 | 75 | 81 | → |
| Kinross | City | Keokuk | 98 | 80 | 73 | 78 | → |
| Kirkman | City | Shelby | 98 | 76 | 64 | 57 | → |
| Kirkville | City | Wapello | 181 | 212 | 169 | 158 | → |
| Kiron | City | Crawford | 301 | 268 | 277 | 269 | → |
| Klemme | City | Hancock | 594 | 593 | 507 | 440 | → |
| Knierim | City | Calhoun | 71 | 69 | 60 | 55 | → |
| Knoxville | City | Marion | 8,252 | 7,743 | 7,312 | 7,587 | → |
| La Motte | City | Jackson | 219 | 268 | 270 | 242 | → |
| La Porte City | City | Black Hawk | 2,126 | 2,324 | 2,288 | 2,287 | → |
| Lacona | City | Warren | 355 | 357 | 357 | 344 | → |
| Ladora | City | Iowa | 308 | 287 | 283 | 229 | → |
| Lake City | City | Calhoun | 1,841 | 1,818 | 1,727 | 1,728 | → |
| Lake Mills | City | Winnebago | 2,158 | 2,140 | 2,111 | 2,141 | → |
| Lake Panorama | Census-Designated Place | Guthrie | 705 | 1,078 | 1,309 | 1,266 | → |
| Lake Park | City | Dickinson | 948 | 1,027 | 1,105 | 1,169 | → |
| Lake View | City | Sac | 1,310 | 1,323 | 1,142 | 1,121 | → |
| Lakeside | City | Buena Vista | 586 | 555 | 700 | 701 | → |
| Lakota | City | Kossuth | 313 | 286 | 294 | 267 | → |
| Lambs Grove | City | Jasper | 300 | 235 | 172 | 172 | → |
| Lamoni | City | Decatur | 2,323 | 2,478 | 2,335 | 1,964 | → |
| Lamont | City | Buchanan | 476 | 500 | 461 | 432 | → |
| Lanesboro | City | Carroll | 189 | 150 | 118 | 118 | → |
| Lansing | City | Allamakee | 1,047 | 1,032 | 999 | 962 | → |
| Larchwood | City | Lyon | 795 | 790 | 866 | 927 | → |
| Larrabee | City | Cherokee | 175 | 149 | 139 | 123 | → |
| Latimer | City | Franklin | 430 | 534 | 502 | 478 | → |
| Laurel | City | Marshall | 265 | 255 | 239 | 217 | → |
| Laurens | City | Pocahontas | 1,565 | 1,455 | 1,265 | 1,264 | → |
| Lawler | City | Chickasaw | 515 | 461 | 442 | 406 | → |
| Lawton | City | Woodbury | 494 | 703 | 916 | 947 | → |
| Le Claire | City | Scott | 2,741 | 2,884 | 3,747 | 4,713 | → |
| Le Grand | City | Marshall / Tama | 857 | 879 | 938 | 906 | → |
| Le Mars | City | Plymouth | 8,572 | 9,240 | 9,831 | 10,568 | → |
| Le Roy | City | Decatur | 34 | 13 | 15 | 9 | → |
| Leando | Census-Designated Place | Van Buren | 120 | 135 | 115 | 121 | → |
| Ledyard | City | Kossuth | 164 | 147 | 130 | 122 | → |
| Lehigh | City | Webster | 536 | 503 | 418 | 398 | → |
| Leighton | City | Mahaska | 135 | 178 | 162 | 153 | → |
| Leland | City | Winnebago | 311 | 258 | 289 | 250 | → |
| Lenox | City | Taylor / Adams | 1,304 | 1,401 | 1,407 | 1,348 | → |
| Leon | City | Decatur | 2,062 | 1,980 | 1,977 | 1,822 | → |
| Lester | City | Lyon | 250 | 251 | 294 | 297 | → |
| Letts | City | Louisa | 386 | 396 | 384 | 365 | → |
| Lewis | City | Cass | 433 | 445 | 433 | 360 | → |
| Libertyville | City | Jefferson | 271 | 320 | 315 | 277 | → |
| Lidderdale | City | Carroll | 202 | 179 | 180 | 166 | → |
| Lime Springs | City | Howard | 439 | 498 | 505 | 475 | → |
| Lincoln | City | Tama | 173 | 182 | 162 | 122 | → |
| Linden | City | Dallas | 202 | 226 | 199 | 198 | → |
| Lineville | City | Wayne | 289 | 268 | 217 | 192 | → |
| Linn Grove | City | Buena Vista | 197 | 211 | 154 | 162 | → |
| Lisbon | City | Linn | 1,477 | 1,904 | 2,141 | 2,231 | → |
| Liscomb | City | Marshall | 255 | 272 | 301 | 292 | → |
| Little Cedar | Census-Designated Place | Mitchell | 35 | 24 | 32 | 64 | → |
| Little Rock | City | Lyon | 473 | 489 | 461 | 439 | → |
| Little Sioux | City | Harrison | 206 | 217 | 170 | 166 | → |
| Livermore | City | Humboldt | 436 | 426 | 384 | 382 | → |
| Lockridge | City | Jefferson | 270 | 263 | 258 | 243 | → |
| Logan | City | Harrison | 1,396 | 1,564 | 1,535 | 1,388 | → |
| Lohrville | City | Calhoun | 427 | 404 | 368 | 379 | → |
| Lone Rock | City | Kossuth | 184 | 157 | 146 | 147 | → |
| Lone Tree | City | Johnson | 962 | 1,147 | 1,302 | 1,357 | → |
| Long Grove | City | Scott | 592 | 571 | 810 | 838 | → |
| Lorimor | City | Union | 377 | 427 | 360 | 386 | → |
| Lost Nation | City | Clinton | 467 | 501 | 446 | 431 | → |
| Loveland | Census-Designated Place | Pottawattamie | 23 | 41 | 35 | 36 | → |
| Lovilia | City | Monroe | 566 | 581 | 551 | 471 | → |
| Low Moor | City | Clinton | 305 | 287 | 278 | 248 | → |
| Lowden | City | Cedar | 726 | 797 | 787 | 800 | → |
| Lowell | Census-Designated Place | Henry | 35 | 96 | 80 | 70 | → |
| Lu Verne | City | Kossuth / Humboldt | 328 | 303 | 261 | 255 | → |
| Luana | City | Clayton | 190 | 249 | 269 | 300 | → |
| Lucas | City | Lucas | 224 | 243 | 216 | 174 | → |
| Luther | City | Boone | 154 | 107 | 122 | 149 | → |
| Luxemburg | City | Dubuque | 257 | 254 | 242 | 241 | → |
| Luzerne | City | Benton | 113 | 96 | 96 | 111 | → |
| Lynnville | City | Jasper | 393 | 380 | 379 | 381 | → |
| Lytton | City | Sac / Calhoun | 320 | 305 | 316 | 280 | → |
| Macedonia | City | Pottawattamie | 259 | 310 | 246 | 267 | → |
| Macksburg | City | Madison | 110 | 141 | 113 | 98 | → |
| Madrid | City | Boone | 2,502 | 2,247 | 2,565 | 2,802 | → |
| Magnolia | City | Harrison | 207 | 195 | 179 | 188 | → |
| Maharishi Vedic City | City | Jefferson | ... | 131 | 1,292 | 272 | → |
| Malcom | City | Poweshiek | 447 | 350 | 294 | 268 | → |
| Mallard | City | Palo Alto | 386 | 290 | 283 | 264 | → |
| Maloy | City | Ringgold | 36 | 30 | 29 | 25 | → |
| Malvern | City | Mills | 1,218 | 1,253 | 1,150 | 1,040 | → |
| Manchester | City | Delaware | 5,168 | 5,274 | 5,181 | 5,068 | → |
| Manilla | City | Crawford | 904 | 846 | 777 | 775 | → |
| Manly | City | Worth | 1,378 | 1,344 | 1,318 | 1,260 | → |
| Manning | City | Carroll | 1,471 | 1,520 | 1,516 | 1,454 | → |
| Manson | City | Calhoun | 1,844 | 1,891 | 1,690 | 1,705 | → |
| Mapleton | City | Monona | 1,352 | 1,337 | 1,224 | 1,166 | → |
| Maquoketa | City | Jackson / Clinton | 6,104 | 6,116 | 6,241 | 6,129 | → |
| Marathon | City | Buena Vista | 320 | 300 | 239 | 231 | → |
| Marble Rock | City | Floyd | 372 | 326 | 310 | 269 | → |
| Marcus | City | Cherokee | 1,192 | 1,137 | 1,117 | 1,075 | → |
| Marengo | City | Iowa | 2,366 | 2,540 | 2,537 | 2,439 | → |
| Marion | City | Linn | 20,405 | 26,636 | 35,225 | 41,534 | → |
| Marne | City | Cass | 149 | 149 | 120 | 108 | → |
| Marquette | City | Clayton | 487 | 427 | 466 | 429 | → |
| Marshalltown | City | Marshall | 25,162 | 26,048 | 27,558 | 27,583 | → |
| Martelle | City | Jones | 288 | 276 | 252 | 247 | → |
| Martensdale | City | Warren | 488 | 473 | 466 | 420 | → |
| Martinsburg | City | Keokuk | 157 | 121 | 112 | 110 | → |
| Marysville | City | Marion | 65 | 59 | 66 | 46 | → |
| Mason City | City | Cerro Gordo | 29,174 | 29,250 | 28,072 | 27,339 | → |
| Masonville | City | Delaware | 129 | 104 | 127 | 99 | → |
| Massena | City | Cass | 372 | 410 | 352 | 357 | → |
| Matlock | City | Sioux | 92 | 83 | 87 | 77 | → |
| Maurice | City | Sioux | 243 | 254 | 275 | 268 | → |
| Maxwell | City | Story | 816 | 808 | 922 | 855 | → |
| Maynard | City | Fayette | 525 | 501 | 511 | 475 | → |
| Maysville | City | Scott | 172 | 163 | 182 | 157 | → |
| McCallsburg | City | Story | 292 | 314 | 333 | 351 | → |
| McCausland | City | Scott | 308 | 305 | 303 | 311 | → |
| McClelland | City | Pottawattamie | 139 | 129 | 155 | 148 | → |
| McGregor | City | Clayton | 805 | 867 | 871 | 738 | → |
| McIntire | City | Mitchell | 147 | 166 | 127 | 113 | → |
| Mechanicsville | City | Cedar | 1,089 | 1,177 | 1,144 | 1,020 | → |
| Mediapolis | City | Des Moines | 1,689 | 1,642 | 1,560 | 1,691 | → |
| Melbourne | City | Marshall | 673 | 792 | 832 | 788 | → |
| Melcher-Dallas | City | Marion | 1,319 | 1,296 | 1,291 | 1,197 | → |
| Melrose | City | Monroe | 150 | 133 | 112 | 111 | → |
| Melvin | City | Osceola | 244 | 241 | 212 | 201 | → |
| Menlo | City | Guthrie | 368 | 365 | 353 | 343 | → |
| Meriden | City | Cherokee | 189 | 184 | 152 | 162 | → |
| Merrill | City | Plymouth | 736 | 767 | 758 | 719 | → |
| Meservey | City | Cerro Gordo | 292 | 249 | 256 | 220 | → |
| Meyer | Census-Designated Place | Mitchell | 36 | 30 | 31 | 14 | → |
| Middle Amana | Census-Designated Place | Iowa | 205 | 269 | 581 | 543 | → |
| Middletown | City | Des Moines | 386 | 406 | 316 | 363 | → |
| Miles | City | Jackson | 411 | 462 | 456 | 409 | → |
| Milford | City | Dickinson | 2,229 | 2,573 | 2,903 | 3,324 | → |
| Miller | Census-Designated Place | Hancock | 59 | 79 | 60 | 50 | → |
| Millersburg | City | Iowa | 188 | 193 | 147 | 136 | → |
| Millerton | City | Wayne | 54 | 48 | 45 | 39 | → |
| Milo | City | Warren | 858 | 839 | 771 | 774 | → |
| Milton | City | Van Buren | 506 | 558 | 444 | 391 | → |
| Minburn | City | Dallas | 358 | 391 | 364 | 325 | → |
| Minden | City | Pottawattamie | 539 | 553 | 611 | 603 | → |
| Mineola | Census-Designated Place | Mills | 134 | 176 | 166 | 154 | → |
| Mingo | City | Jasper | 257 | 269 | 302 | 303 | → |
| Missouri Valley | City | Harrison | 2,913 | 3,065 | 2,835 | 2,681 | → |
| Mitchell | City | Mitchell | 225 | 152 | 136 | 122 | → |
| Mitchellville | City | Polk / Jasper | 1,692 | 2,040 | 2,258 | 2,482 | → |
| Modale | City | Harrison | 295 | 303 | 283 | 274 | → |
| Mona | Census-Designated Place | Mitchell | 62 | 66 | 34 | 35 | → |
| Mondamin | City | Harrison | 403 | 423 | 402 | 338 | → |
| Monmouth | City | Jackson | 179 | 180 | 156 | 128 | → |
| Monona | City | Clayton | 1,527 | 1,556 | 1,564 | 1,472 | → |
| Monroe | City | Jasper | 1,769 | 1,812 | 1,830 | 1,965 | → |
| Montezuma | City | Poweshiek | 1,654 | 1,455 | 1,454 | 1,446 | → |
| Monticello | City | Jones | 3,550 | 3,675 | 3,774 | 4,036 | → |
| Montour | City | Tama | 312 | 280 | 249 | 202 | → |
| Montpelier | Census-Designated Place | Muscatine | 230 | 234 | 195 | 186 | → |
| Montrose | City | Lee | 981 | 963 | 831 | 743 | → |
| Mooar | Census-Designated Place | Lee | 257 | 393 | 309 | 321 | → |
| Moorhead | City | Monona | 236 | 167 | 224 | 197 | → |
| Moorland | City | Webster | 221 | 199 | 171 | 169 | → |
| Moravia | City | Appanoose / Monroe | 688 | 712 | 665 | 638 | → |
| Morley | City | Jones | 85 | 93 | 115 | 95 | → |
| Morning Sun | City | Louisa | 843 | 881 | 828 | 750 | → |
| Morrison | City | Grundy | 125 | 97 | 94 | 97 | → |
| Moscow | Census-Designated Place | Muscatine | 157 | 170 | 182 | 290 | → |
| Moulton | City | Appanoose | 623 | 658 | 605 | 608 | → |
| Mount Auburn | City | Benton | 141 | 160 | 150 | 160 | → |
| Mount Ayr | City | Ringgold | 1,811 | 1,934 | 1,693 | 1,627 | → |
| Mount Pleasant | City | Henry | 8,055 | 8,763 | 8,666 | 9,270 | → |
| Mount Sterling | Census-Designated Place | Van Buren | 53 | 39 | 36 | 33 | → |
| Mount Union | Census-Designated Place | Henry | 140 | 132 | 107 | 120 | → |
| Mount Vernon | City | Linn | 3,652 | 3,809 | 4,506 | 4,531 | → |
| Moville | City | Woodbury | 1,307 | 1,593 | 1,618 | 1,688 | → |
| Murray | City | Clarke | 731 | 762 | 756 | 683 | → |
| Muscatine | City | Muscatine | 22,878 | 22,749 | 23,771 | 23,799 | → |
| Mystic | City | Appanoose | 544 | 588 | 424 | 325 | → |
| Nashua | City | Chickasaw / Floyd | 1,505 | 1,624 | 1,658 | 1,554 | → |
| Nemaha | City | Sac | 112 | 94 | 85 | 67 | → |
| Neola | City | Pottawattamie | 905 | 852 | 846 | 915 | → |
| Nevada | City | Story | 6,028 | 6,663 | 6,798 | 6,924 | → |
| New Albin | City | Allamakee | 536 | 546 | 518 | 435 | → |
| New Hampton | City | Chickasaw | 3,799 | 3,706 | 3,572 | 3,495 | → |
| New Hartford | City | Butler | 688 | 659 | 516 | 572 | → |
| New Haven | Census-Designated Place | Mitchell | 97 | 91 | 91 | 77 | → |
| New Liberty | City | Scott | 142 | 126 | 139 | 137 | → |
| New London | City | Henry | 1,993 | 1,960 | 1,897 | 1,911 | → |
| New Market | City | Taylor | 454 | 456 | 415 | 386 | → |
| New Providence | City | Hardin | 240 | 229 | 230 | 236 | → |
| New Sharon | City | Mahaska | 1,168 | 1,338 | 1,293 | 1,260 | → |
| New Vienna | City | Dubuque | 373 | 394 | 409 | 383 | → |
| New Virginia | City | Warren | 428 | 470 | 488 | 499 | → |
| Newell | City | Buena Vista | 967 | 885 | 876 | 903 | → |
| Newhall | City | Benton | 887 | 886 | 896 | 880 | → |
| Newton | City | Jasper | 14,915 | 15,589 | 15,257 | 15,757 | → |
| Nichols | City | Muscatine | 366 | 368 | 374 | 340 | → |
| Nodaway | City | Adams | 153 | 131 | 114 | 75 | → |
| Nora Springs | City | Floyd / Cerro Gordo | 1,508 | 1,527 | 1,431 | 1,367 | → |
| North Buena Vista | City | Clayton | 145 | 120 | 121 | 107 | → |
| North English | City | Iowa | 944 | 989 | 1,042 | 1,067 | → |
| North Liberty | City | Johnson | 3,011 | 5,350 | 13,393 | 20,481 | → |
| North Washington | City | Chickasaw | 107 | 118 | 118 | 111 | → |
| Northboro | City | Page | 78 | 58 | 58 | 54 | → |
| Northwood | City | Worth | 2,016 | 2,055 | 1,989 | 2,072 | → |
| Norwalk | City | Warren / Polk | 5,747 | 6,998 | 8,989 | 12,799 | → |
| Norway | City | Benton | 583 | 612 | 551 | 465 | → |
| Numa | City | Appanoose | 151 | 104 | 92 | 71 | → |
| Oak Hills | Census-Designated Place | Des Moines | 184 | 161 | 171 | 186 | → |
| Oakland | City | Pottawattamie | 1,507 | 1,487 | 1,527 | 1,523 | → |
| Oakland Acres | City | Jasper | 152 | 166 | 156 | 175 | → |
| Oakville | City | Louisa | 442 | 438 | 173 | 199 | → |
| Ocheyedan | City | Osceola | 542 | 536 | 490 | 438 | → |
| Odebolt | City | Sac | 1,177 | 1,156 | 1,014 | 995 | → |
| Oelwein | City | Fayette | 6,792 | 6,693 | 6,414 | 5,929 | → |
| Ogden | City | Boone | 1,914 | 2,023 | 2,044 | 2,009 | → |
| Okoboji | City | Dickinson | 783 | 849 | 820 | 763 | → |
| Olds | City | Henry | 228 | 246 | 229 | 192 | → |
| Olin | City | Jones | 663 | 723 | 698 | 657 | → |
| Ollie | City | Keokuk | 207 | 224 | 215 | 200 | → |
| Onawa | City | Monona | 2,933 | 3,105 | 2,998 | 2,909 | → |
| Onslow | City | Jones | 225 | 225 | 197 | 199 | → |
| Orange City | City | Sioux | 5,068 | 5,631 | 6,060 | 6,274 | → |
| Orchard | City | Mitchell | 93 | 86 | 72 | 66 | → |
| Orient | City | Adair | 412 | 393 | 408 | 363 | → |
| Orleans | City | Dickinson | 560 | 626 | 609 | 520 | → |
| Osage | City | Mitchell | 3,457 | 3,477 | 3,623 | 3,629 | → |
| Osceola | City | Clarke | 4,198 | 4,749 | 4,919 | 5,409 | → |
| Oskaloosa | City | Mahaska | 10,701 | 11,080 | 11,503 | 11,549 | → |
| Ossian | City | Winneshiek | 810 | 856 | 845 | 804 | → |
| Osterdock | City | Clayton | 49 | 54 | 50 | 44 | → |
| Otho | City | Webster | 546 | 590 | 542 | 426 | → |
| Oto | City | Woodbury | 155 | 146 | 110 | 72 | → |
| Otranto | Census-Designated Place | Mitchell | 21 | 24 | 27 | 27 | → |
| Ottosen | City | Humboldt | 72 | 61 | 55 | 40 | → |
| Ottumwa | City | Wapello | 24,596 | 24,867 | 25,028 | 25,538 | → |
| Owasa | City | Hardin | 37 | 38 | 43 | 30 | → |
| Oxford | City | Johnson | 662 | 718 | 803 | 718 | → |
| Oxford Junction | City | Jones | 581 | 574 | 494 | 427 | → |
| Oyens | City | Plymouth | 113 | 129 | 101 | 92 | → |
| Pacific Junction | City | Mills | 546 | 504 | 471 | 100 | → |
| Packwood | City | Jefferson | 214 | 223 | 204 | 184 | → |
| Palmer | City | Pocahontas | 228 | 206 | 165 | 139 | → |
| Palo | City | Linn | 562 | 621 | 951 | 1,411 | → |
| Panama | City | Shelby | 201 | 208 | 221 | 234 | → |
| Panora | City | Guthrie | 1,114 | 1,176 | 1,118 | 1,090 | → |
| Panorama Park | City | Scott | 127 | 123 | 134 | 141 | → |
| Park View | Census-Designated Place | Scott | 2,192 | 2,169 | 2,571 | 2,709 | → |
| Parkersburg | City | Butler | 1,813 | 1,895 | 1,870 | 2,015 | → |
| Parnell | City | Iowa | 209 | 218 | 193 | 194 | → |
| Paton | City | Greene | 255 | 260 | 236 | 220 | → |
| Patterson | City | Madison | 128 | 132 | 149 | 175 | → |
| Paullina | City | O'Brien | 1,149 | 1,092 | 1,052 | 979 | → |
| Pella | City | Marion / Mahaska | 9,264 | 9,914 | 10,340 | 10,458 | → |
| Peosta | City | Dubuque | 153 | 651 | 1,393 | 1,916 | → |
| Percival | Census-Designated Place | Fremont | 21 | 78 | 87 | 53 | → |
| Perry | City | Dallas | 6,667 | 7,629 | 7,724 | 7,840 | → |
| Persia | City | Harrison | 312 | 359 | 319 | 297 | → |
| Peterson | City | Clay | 415 | 363 | 332 | 322 | → |
| Pierson | City | Woodbury | 330 | 373 | 366 | 341 | → |
| Pilot Mound | City | Boone | 199 | 218 | 173 | 160 | → |
| Pioneer | Census-Designated Place | Humboldt | 46 | 21 | 23 | 4 | → |
| Pisgah | City | Harrison | 268 | 314 | 251 | 241 | → |
| Plainfield | City | Bremer | 453 | 438 | 436 | 392 | → |
| Plainview | Census-Designated Place | Scott | ... | ... | 11 | 19 | → |
| Plano | City | Appanoose | 75 | 58 | 70 | 59 | → |
| Pleasant Hill | City | Polk | 4,698 | 5,496 | 8,775 | 10,161 | → |
| Pleasant Plain | City | Jefferson | 128 | 127 | 93 | 83 | → |
| Pleasanton | City | Decatur | 58 | 41 | 48 | 32 | → |
| Pleasantville | City | Marion | 1,541 | 1,547 | 1,692 | 1,684 | → |
| Plover | City | Pocahontas | 101 | 95 | 77 | 54 | → |
| Plymouth | City | Cerro Gordo | 453 | 429 | 386 | 376 | → |
| Pocahontas | City | Pocahontas | 2,130 | 1,981 | 1,793 | 1,871 | → |
| Polk City | City | Polk | 1,892 | 2,374 | 3,417 | 5,544 | → |
| Pomeroy | City | Calhoun | 763 | 709 | 662 | 527 | → |
| Popejoy | City | Franklin | 96 | 78 | 79 | 75 | → |
| Portland | Census-Designated Place | Cerro Gordo | 40 | 42 | 35 | 28 | → |
| Portsmouth | City | Shelby | 213 | 230 | 195 | 186 | → |
| Postville | City | Allamakee / Clayton | 1,538 | 2,260 | 2,224 | 2,506 | → |
| Prairie City | City | Jasper | 1,384 | 1,371 | 1,680 | 1,695 | → |
| Prairieburg | City | Linn | 201 | 175 | 178 | 156 | → |
| Prescott | City | Adams | 287 | 268 | 257 | 191 | → |
| Preston | City | Jackson | 1,009 | 948 | 1,010 | 949 | → |
| Primghar | City | O'Brien | 955 | 891 | 909 | 906 | → |
| Princeton | City | Scott | 912 | 932 | 893 | 926 | → |
| Promise City | City | Wayne | 132 | 101 | 109 | 89 | → |
| Protivin | City | Howard / Chickasaw | 313 | 312 | 281 | 267 | → |
| Pulaski | City | Davis | 307 | 242 | 260 | 262 | → |
| Quasqueton | City | Buchanan | 579 | 582 | 554 | 575 | → |
| Quimby | City | Cherokee | 351 | 373 | 319 | 248 | → |
| Radcliffe | City | Hardin | 574 | 607 | 545 | 557 | → |
| Rake | City | Winnebago | 238 | 208 | 226 | 186 | → |
| Ralston | City | Carroll / Greene | 133 | 93 | 77 | 79 | → |
| Randalia | City | Fayette | 92 | 86 | 66 | 52 | → |
| Randall | City | Hamilton | 161 | 154 | 173 | 154 | → |
| Randolph | City | Fremont | 243 | 207 | 165 | 189 | → |
| Rathbun | City | Appanoose | 90 | 88 | 75 | 41 | → |
| Raymond | City | Black Hawk | 617 | 540 | 788 | 760 | → |
| Readlyn | City | Bremer | 773 | 783 | 810 | 846 | → |
| Reasnor | City | Jasper | 191 | 205 | 152 | 153 | → |
| Red Oak | City | Montgomery | 6,274 | 6,208 | 5,742 | 5,594 | → |
| Redding | City | Ringgold | 119 | 78 | 82 | 64 | → |
| Redfield | City | Dallas | 875 | 828 | 831 | 730 | → |
| Reinbeck | City | Grundy | 1,605 | 1,754 | 1,677 | 1,667 | → |
| Rembrandt | City | Buena Vista | 229 | 230 | 204 | 211 | → |
| Remsen | City | Plymouth | 1,513 | 1,770 | 1,663 | 1,677 | → |
| Renwick | City | Humboldt | 287 | 303 | 242 | 230 | → |
| Rhodes | City | Marshall | 272 | 306 | 305 | 270 | → |
| Riceville | City | Howard / Mitchell | 849 | 838 | 779 | 804 | → |
| Richland | City | Keokuk | 522 | 578 | 601 | 537 | → |
| Rickardsville | City | Dubuque | 200 | 189 | 180 | 207 | → |
| Ricketts | City | Crawford | 122 | 144 | 145 | 109 | → |
| Ridgeway | City | Winneshiek | 295 | 291 | 307 | 275 | → |
| Rinard | City | Calhoun | 71 | 73 | 52 | 32 | → |
| Ringsted | City | Emmet | 481 | 435 | 426 | 365 | → |
| Rippey | City | Greene | 275 | 319 | 292 | 219 | → |
| River Sioux | Census-Designated Place | Harrison | ... | 42 | 59 | 42 | → |
| Riverdale | City | Scott | 449 | 441 | 388 | 379 | → |
| Riverside | City | Washington | 824 | 941 | 992 | 1,058 | → |
| Riverton | City | Fremont | 333 | 304 | 304 | 249 | → |
| Robins | City | Linn | 1,145 | 1,928 | 3,175 | 3,359 | → |
| Rochester | Census-Designated Place | Cedar | 139 | 157 | 133 | 142 | → |
| Rock Falls | City | Cerro Gordo | 159 | 169 | 155 | 150 | → |
| Rock Rapids | City | Lyon | 2,688 | 2,574 | 2,547 | 2,609 | → |
| Rock Valley | City | Sioux | 2,540 | 2,906 | 3,480 | 4,065 | → |
| Rockford | City | Floyd | 892 | 909 | 860 | 762 | → |
| Rockwell | City | Cerro Gordo | 1,037 | 989 | 1,039 | 1,071 | → |
| Rockwell City | City | Calhoun | 2,142 | 2,225 | 2,220 | 2,256 | → |
| Rodman | City | Palo Alto | 58 | 56 | 43 | 30 | → |
| Rodney | City | Monona | 71 | 67 | 60 | 47 | → |
| Roland | City | Story | 1,048 | 1,322 | 1,284 | 1,362 | → |
| Rolfe | City | Pocahontas | 735 | 677 | 584 | 511 | → |
| Rome | City | Henry | 124 | 115 | 116 | 115 | → |
| Rose Hill | City | Mahaska | 173 | 207 | 166 | 160 | → |
| Roseville | Census-Designated Place | Floyd | 24 | 33 | 49 | 39 | → |
| Rossie | City | Clay | 90 | 59 | 70 | 46 | → |
| Rowan | City | Wright | 189 | 200 | 170 | 121 | → |
| Rowley | City | Buchanan | 272 | 290 | 269 | 268 | → |
| Royal | City | Clay | 444 | 482 | 446 | 382 | → |
| Rudd | City | Floyd | 440 | 434 | 369 | 357 | → |
| Runnells | City | Polk | 306 | 364 | 513 | 455 | → |
| Russell | City | Lucas | 531 | 559 | 554 | 471 | → |
| Ruthven | City | Palo Alto | 723 | 715 | 734 | 731 | → |
| Rutland | City | Humboldt | 310 | 143 | 125 | 117 | → |
| Ryan | City | Delaware | 386 | 405 | 365 | 348 | → |
| Sabula | City | Jackson | 710 | 673 | 588 | 501 | → |
| Sac City | City | Sac | 2,535 | 2,368 | 2,222 | 2,059 | → |
| Sageville | City | Dubuque | 317 | 199 | 104 | 91 | → |
| Salem | City | Henry | 495 | 439 | 387 | 398 | → |
| Salix | City | Woodbury | 370 | 401 | 359 | 294 | → |
| Sanborn | City | O'Brien | 1,345 | 1,349 | 1,404 | 1,391 | → |
| Sandusky | Census-Designated Place | Lee | 232 | 338 | 341 | 297 | → |
| Sandyville | City | Warren | 60 | 61 | 51 | 57 | → |
| Saylorville | Census-Designated Place | Polk | 2,296 | 2,985 | 3,301 | 3,584 | → |
| Scarville | City | Winnebago | 92 | 97 | 72 | 77 | → |
| Schaller | City | Sac | 776 | 779 | 772 | 728 | → |
| Schleswig | City | Crawford | 858 | 834 | 882 | 833 | → |
| Scranton | City | Greene | 597 | 604 | 557 | 509 | → |
| Searsboro | City | Poweshiek | 164 | 159 | 148 | 128 | → |
| Sergeant Bluff | City | Woodbury | 2,695 | 3,392 | 4,310 | 5,015 | → |
| Sexton | Census-Designated Place | Kossuth | 64 | 43 | 37 | 46 | → |
| Seymour | City | Wayne | 869 | 813 | 701 | 635 | → |
| Shambaugh | City | Page | 197 | 189 | 189 | 162 | → |
| Shannon City | City | Union / Ringgold | 88 | 79 | 73 | 72 | → |
| Sharpsburg | City | Taylor | 116 | 98 | 89 | 70 | → |
| Sheffield | City | Franklin | 1,144 | 928 | 1,174 | 1,126 | → |
| Shelby | City | Shelby / Pottawattamie | 635 | 696 | 640 | 724 | → |
| Sheldahl | City | Polk / Story / Boone | 315 | 329 | 323 | 296 | → |
| Sheldon | City | O'Brien / Sioux | 4,937 | 5,019 | 5,196 | 5,513 | → |
| Shell Rock | City | Butler | 1,392 | 1,287 | 1,293 | 1,268 | → |
| Shellsburg | City | Benton | 769 | 938 | 994 | 963 | → |
| Shenandoah | City | Page / Fremont | 5,588 | 5,554 | 5,145 | 4,925 | → |
| Sherrill | City | Dubuque | 145 | 200 | 177 | 185 | → |
| Shueyville | City | Johnson | 223 | 326 | 562 | 733 | → |
| Sibley | City | Osceola | 2,820 | 2,796 | 2,798 | 2,859 | → |
| Sidney | City | Fremont | 1,292 | 1,298 | 1,138 | 1,067 | → |
| Sigourney | City | Keokuk | 2,148 | 2,203 | 2,061 | 2,009 | → |
| Silver City | City | Mills | 252 | 259 | 246 | 242 | → |
| Sioux Center | City | Sioux | 5,013 | 6,059 | 7,036 | 8,240 | → |
| Sioux City | City | Woodbury / Plymouth | 80,566 | 85,096 | 82,685 | 85,781 | → |
| Sioux Rapids | City | Buena Vista | 792 | 746 | 775 | 748 | → |
| Slater | City | Story / Boone | 1,272 | 1,308 | 1,491 | 1,540 | → |
| Sloan | City | Woodbury | 937 | 1,045 | 973 | 1,047 | → |
| Smithland | City | Woodbury | 252 | 226 | 222 | 186 | → |
| Soldier | City | Monona | 205 | 193 | 179 | 185 | → |
| Solon | City | Johnson | 1,050 | 1,231 | 2,088 | 3,024 | → |
| Somers | City | Calhoun | 161 | 165 | 113 | 124 | → |
| South Amana | Census-Designated Place | Iowa | 111 | 121 | 159 | 165 | → |
| South English | City | Keokuk | 215 | 209 | 219 | 202 | → |
| Spencer | City | Clay | 11,111 | 11,334 | 11,247 | 11,324 | → |
| Sperry | Census-Designated Place | Des Moines | 142 | 133 | 130 | 124 | → |
| Spillville | City | Winneshiek | 389 | 374 | 370 | 385 | → |
| Spirit Lake | City | Dickinson | 3,892 | 4,296 | 4,863 | 5,440 | → |
| Spragueville | City | Jackson | 118 | 85 | 83 | 91 | → |
| Spring Hill | City | Warren | 91 | 92 | 63 | 67 | → |
| Springbrook | City | Jackson | 165 | 180 | 151 | 142 | → |
| Springville | City | Linn | 1,051 | 1,097 | 1,068 | 1,159 | → |
| St. Ansgar | City | Mitchell | 1,102 | 1,026 | 1,104 | 1,162 | → |
| St. Anthony | City | Marshall | 115 | 111 | 102 | 76 | → |
| St. Benedict | Census-Designated Place | Kossuth | 59 | 49 | 39 | 31 | → |
| St. Charles | City | Madison | 542 | 619 | 680 | 642 | → |
| St. Donatus | City | Jackson | 145 | 145 | 137 | 122 | → |
| St. Joseph | Census-Designated Place | Kossuth | 69 | 54 | 61 | 51 | → |
| St. Lucas | City | Fayette | 170 | 180 | 145 | 169 | → |
| St. Marys | City | Warren | 111 | 134 | 127 | 106 | → |
| St. Olaf | City | Clayton | 127 | 132 | 108 | 103 | → |
| St. Paul | City | Lee | 120 | 118 | 129 | 106 | → |
| Stacyville | City | Mitchell | 461 | 470 | 490 | 456 | → |
| Stanhope | City | Hamilton | 450 | 488 | 429 | 363 | → |
| Stanley | City | Buchanan / Fayette | 116 | 130 | 123 | 86 | → |
| Stanton | City | Montgomery | 701 | 714 | 689 | 676 | → |
| Stanwood | City | Cedar | 654 | 680 | 684 | 639 | → |
| State Center | City | Marshall | 1,247 | 1,350 | 1,468 | 1,396 | → |
| Steamboat Rock | City | Hardin | 335 | 329 | 310 | 266 | → |
| Stockport | City | Van Buren | 260 | 284 | 296 | 272 | → |
| Stockton | City | Muscatine | 191 | 183 | 197 | 178 | → |
| Stone City | Census-Designated Place | Jones | 63 | 194 | 192 | 186 | → |
| Storm Lake | City | Buena Vista | 8,974 | 10,113 | 10,638 | 11,267 | → |
| Story City | City | Story | 2,963 | 3,238 | 3,431 | 3,348 | → |
| Stout | City | Grundy | 192 | 218 | 218 | 190 | → |
| Stratford | City | Hamilton / Webster | 762 | 745 | 741 | 704 | → |
| Strawberry Point | City | Clayton | 1,369 | 1,380 | 1,271 | 1,158 | → |
| Struble | City | Plymouth | 67 | 81 | 78 | 68 | → |
| Stuart | City | Adair / Guthrie | 1,526 | 1,724 | 1,652 | 1,786 | → |
| Sully | City | Jasper | 835 | 927 | 821 | 882 | → |
| Sumner | City | Bremer / Fayette | 2,118 | 2,102 | 2,026 | 2,032 | → |
| Sun Valley Lake | Census-Designated Place | Ringgold | 128 | 235 | 161 | 187 | → |
| Superior | City | Dickinson | 128 | 140 | 130 | 133 | → |
| Sutherland | City | O'Brien | 729 | 707 | 649 | 631 | → |
| Swaledale | City | Cerro Gordo | 192 | 168 | 166 | 145 | → |
| Swan | City | Marion | 76 | 121 | 72 | 76 | → |
| Swea City | City | Kossuth | 634 | 642 | 536 | 565 | → |
| Swedesburg | Census-Designated Place | Henry | 116 | 103 | 104 | 99 | → |
| Swisher | City | Johnson | 649 | 821 | 880 | 914 | → |
| Tabor | City | Fremont / Mills | 969 | 1,018 | 1,044 | 1,013 | → |
| Tama | City | Tama | 2,698 | 2,736 | 2,877 | 3,127 | → |
| Templeton | City | Carroll | 328 | 322 | 351 | 349 | → |
| Tennant | City | Shelby | 78 | 79 | 68 | 79 | → |
| Terril | City | Dickinson | 383 | 404 | 368 | 334 | → |
| Thayer | City | Union | 79 | 64 | 60 | 50 | → |
| Thompson | City | Winnebago | 507 | 598 | 502 | 499 | → |
| Thor | City | Humboldt | 205 | 174 | 186 | 180 | → |
| Thornburg | City | Keokuk | 91 | 84 | 69 | 48 | → |
| Thornton | City | Cerro Gordo | 431 | 422 | 422 | 406 | → |
| Thurman | City | Fremont | 245 | 238 | 230 | 164 | → |
| Tiffin | City | Johnson | 548 | 1,026 | 1,947 | 4,515 | → |
| Tingley | City | Ringgold | 179 | 171 | 184 | 136 | → |
| Tipton | City | Cedar | 3,008 | 3,160 | 3,215 | 3,149 | → |
| Titonka | City | Kossuth | 612 | 581 | 474 | 508 | → |
| Toeterville | Census-Designated Place | Mitchell | 29 | 63 | 48 | 53 | → |
| Toledo | City | Tama | 2,386 | 2,566 | 2,331 | 2,373 | → |
| Toronto | City | Clinton | 132 | 134 | 124 | 102 | → |
| Traer | City | Tama | 1,558 | 1,594 | 1,703 | 1,580 | → |
| Trenton | Census-Designated Place | Henry | 52 | 41 | 43 | 74 | → |
| Treynor | City | Pottawattamie | 884 | 761 | 924 | 1,034 | → |
| Tripoli | City | Bremer | 1,222 | 1,313 | 1,315 | 1,191 | → |
| Truesdale | City | Buena Vista | 132 | 91 | 81 | 66 | → |
| Truro | City | Madison | 395 | 427 | 486 | 506 | → |
| Turin | City | Monona | 95 | 87 | 68 | 72 | → |
| Twin Lakes | Census-Designated Place | Calhoun | 126 | 266 | 334 | 316 | → |
| Udell | City | Appanoose | 76 | 58 | 47 | 32 | → |
| Underwood | City | Pottawattamie | 520 | 695 | 938 | 953 | → |
| Union | City | Hardin | 448 | 427 | 399 | 393 | → |
| Unionville | City | Appanoose | 133 | 131 | 99 | 76 | → |
| University Heights | City | Johnson | 1,036 | 976 | 1,035 | 1,226 | → |
| University Park | City | Mahaska | 598 | 540 | 487 | 487 | → |
| Urbana | City | Benton | 620 | 1,033 | 1,456 | 1,557 | → |
| Urbandale | City | Polk / Dallas | 23,733 | 29,195 | 39,472 | 45,585 | → |
| Ute | City | Monona | 395 | 374 | 372 | 342 | → |
| Vail | City | Crawford | 388 | 451 | 436 | 391 | → |
| Valeria | City | Jasper | 69 | 64 | 57 | 39 | → |
| Van Horne | City | Benton | 713 | 708 | 685 | 773 | → |
| Van Meter | City | Dallas | 821 | 916 | 1,031 | 1,485 | → |
| Van Wert | City | Decatur | 249 | 225 | 232 | 177 | → |
| Varina | City | Pocahontas | 102 | 90 | 71 | 68 | → |
| Ventura | City | Cerro Gordo | 563 | 669 | 717 | 714 | → |
| Victor | City | Iowa / Poweshiek | 968 | 949 | 898 | 872 | → |
| Villisca | City | Montgomery | 1,337 | 1,350 | 1,252 | 1,130 | → |
| Vincent | City | Webster | 185 | 158 | 174 | 129 | → |
| Vining | City | Tama | 78 | 70 | 50 | 53 | → |
| Vinton | City | Benton | 5,139 | 5,131 | 5,261 | 4,934 | → |
| Volga | City | Clayton | 307 | 249 | 208 | 203 | → |
| Wadena | City | Fayette | 244 | 243 | 262 | 208 | → |
| Wahpeton | City | Dickinson | 482 | 457 | 342 | 345 | → |
| Walcott | City | Scott / Muscatine | 1,361 | 1,524 | 1,619 | 1,555 | → |
| Walford | City | Linn / Benton | 314 | 1,218 | 1,462 | 1,367 | → |
| Walker | City | Linn | 669 | 755 | 783 | 687 | → |
| Wall Lake | City | Sac | 875 | 848 | 819 | 756 | → |
| Wallingford | City | Emmet | 231 | 212 | 192 | 161 | → |
| Walnut | City | Pottawattamie | 876 | 886 | 785 | 739 | → |
| Wapello | City | Louisa | 2,028 | 2,140 | 2,069 | 2,080 | → |
| Washburn | Census-Designated Place | Black Hawk | 944 | 947 | 876 | 870 | → |
| Washington | City | Washington | 7,148 | 7,087 | 7,270 | 7,357 | → |
| Washta | City | Cherokee | 295 | 279 | 246 | 208 | → |
| Waterloo | City | Black Hawk | 66,486 | 68,750 | 68,490 | 67,320 | → |
| Waterville | City | Allamakee | 140 | 141 | 144 | 107 | → |
| Watkins | Census-Designated Place | Benton | 59 | 101 | 118 | 116 | → |
| Waucoma | City | Fayette | 303 | 297 | 260 | 230 | → |
| Waukee | City | Dallas | 2,785 | 5,447 | 13,813 | 23,952 | → |
| Waukon | City | Allamakee | 4,023 | 4,127 | 3,908 | 3,826 | → |
| Waverly | City | Bremer | 8,546 | 8,969 | 9,874 | 10,396 | → |
| Wayland | City | Henry | 846 | 959 | 957 | 962 | → |
| Webb | City | Clay | 167 | 165 | 141 | 141 | → |
| Webster | City | Keokuk | 103 | 92 | 89 | 96 | → |
| Webster City | City | Hamilton | 7,925 | 8,194 | 8,074 | 7,825 | → |
| Weldon | City | Decatur | 153 | 143 | 125 | 137 | → |
| Wellman | City | Washington | 1,146 | 1,414 | 1,411 | 1,527 | → |
| Wellsburg | City | Grundy | 683 | 718 | 707 | 722 | → |
| Welton | City | Clinton | 184 | 167 | 165 | 128 | → |
| Wesley | City | Kossuth | 460 | 469 | 390 | 395 | → |
| West Amana | Census-Designated Place | Iowa | 81 | 66 | 135 | 140 | → |
| West Bend | City | Palo Alto / Kossuth | 884 | 828 | 787 | 794 | → |
| West Branch | City | Cedar / Johnson | 1,958 | 2,201 | 2,327 | 2,504 | → |
| West Burlington | City | Des Moines | 3,120 | 3,159 | 3,005 | 3,200 | → |
| West Chester | City | Washington | 178 | 162 | 146 | 146 | → |
| West Des Moines | City | Polk / Dallas / Warren / Madison | 32,336 | 47,154 | 56,707 | 68,726 | → |
| West Liberty | City | Muscatine | 2,879 | 3,348 | 3,753 | 3,859 | → |
| West Okoboji | City | Dickinson | 263 | 333 | 296 | 303 | → |
| West Point | City | Lee | 1,115 | 983 | 962 | 923 | → |
| West Union | City | Fayette | 2,483 | 2,549 | 2,490 | 2,484 | → |
| Westfield | City | Plymouth | 167 | 192 | 129 | 122 | → |
| Westgate | City | Fayette | 209 | 229 | 227 | 192 | → |
| Weston | Census-Designated Place | Pottawattamie | ... | 21 | 92 | 78 | → |
| Westphalia | City | Shelby | 140 | 160 | 127 | 130 | → |
| Westside | City | Crawford | 354 | 327 | 299 | 286 | → |
| Westwood | City | Henry | 104 | 127 | 112 | 102 | → |
| Wever | Census-Designated Place | Lee | 76 | 128 | 125 | 101 | → |
| What Cheer | City | Keokuk | 762 | 679 | 646 | 606 | → |
| Wheatland | City | Clinton | 720 | 771 | 764 | 778 | → |
| Whiting | City | Monona | 683 | 801 | 762 | 746 | → |
| Whittemore | City | Kossuth | 535 | 529 | 502 | 496 | → |
| Whitten | City | Hardin | 142 | 159 | 147 | 100 | → |
| Willey | City | Carroll | 78 | 105 | 88 | 73 | → |
| Williams | City | Hamilton | 355 | 427 | 344 | 308 | → |
| Williamsburg | City | Iowa | 2,212 | 2,654 | 3,063 | 3,349 | → |
| Williamson | City | Lucas | 168 | 162 | 157 | 117 | → |
| Wilton | City | Muscatine / Cedar | 2,666 | 2,798 | 2,788 | 2,928 | → |
| Windsor Heights | City | Polk | 5,108 | 4,791 | 4,903 | 5,254 | → |
| Winfield | City | Henry | 1,051 | 1,132 | 1,134 | 1,035 | → |
| Winterset | City | Madison | 4,248 | 4,782 | 5,204 | 5,357 | → |
| Winthrop | City | Buchanan | 746 | 776 | 848 | 823 | → |
| Wiota | City | Cass | 160 | 149 | 116 | 91 | → |
| Woden | City | Hancock | 268 | 241 | 227 | 186 | → |
| Woodbine | City | Harrison | 1,535 | 1,553 | 1,485 | 1,629 | → |
| Woodburn | City | Clarke | 240 | 243 | 202 | 145 | → |
| Woodward | City | Dallas / Boone | 1,639 | 1,325 | 1,474 | 1,346 | → |
| Woolstock | City | Wright | 212 | 204 | 168 | 143 | → |
| Worthington | City | Dubuque | 423 | 368 | 409 | 380 | → |
| Wyoming | City | Jones | 702 | 628 | 515 | 526 | → |
| Yale | City | Guthrie | 226 | 287 | 246 | 267 | → |
| Yarmouth | Census-Designated Place | Des Moines | 93 | 66 | 79 | 61 | → |
| Yetter | City | Calhoun | 49 | 36 | 34 | 20 | → |
| Yorktown | City | Page | 96 | 83 | 89 | 61 | → |
| Zearing | City | Story | 614 | 619 | 554 | 536 | → |
| Zwingle | City | Dubuque / Jackson | 95 | 99 | 90 | 86 | → |
Source: U.S. Census Bureau (web).
Explanation: Latest available rebased population figures are used. In case of significant changes, they were recalculated by using census block data.