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 | |
|---|---|---|---|---|---|
| Adair | County | 8,409 | 8,252 | 7,682 | → |
| Adams | County | 4,866 | 4,479 | 4,029 | → |
| Allamakee | County | 13,855 | 14,687 | 14,330 | → |
| Appanoose | County | 13,743 | 13,715 | 12,887 | → |
| Audubon | County | 7,334 | 6,826 | 6,119 | → |
| Benton | County | 22,429 | 25,312 | 26,076 | → |
| Black Hawk | County | 123,798 | 127,990 | 131,090 | → |
| Boone | County | 25,186 | 26,206 | 26,306 | → |
| Bremer | County | 22,813 | 23,361 | 24,276 | → |
| Buchanan | County | 20,844 | 21,092 | 20,958 | → |
| Buena Vista | County | 19,965 | 20,415 | 20,260 | → |
| Butler | County | 15,731 | 15,307 | 14,867 | → |
| Calhoun | County | 11,508 | 11,114 | 9,670 | → |
| Carroll | County | 21,423 | 21,433 | 20,816 | → |
| Cass | County | 15,128 | 14,689 | 13,956 | → |
| Cedar | County | 17,444 | 18,181 | 18,499 | → |
| Cerro Gordo | County | 46,733 | 46,454 | 44,151 | → |
| Cherokee | County | 14,098 | 13,032 | 12,072 | → |
| Chickasaw | County | 13,295 | 13,095 | 12,439 | → |
| Clarke | County | 8,287 | 9,131 | 9,286 | → |
| Clay | County | 17,585 | 17,369 | 16,667 | → |
| Clayton | County | 19,054 | 18,667 | 18,129 | → |
| Clinton | County | 51,040 | 50,159 | 49,116 | → |
| Crawford | County | 16,775 | 16,945 | 17,096 | → |
| Dallas | County | 29,755 | 41,109 | 66,135 | → |
| Davis | County | 8,312 | 8,541 | 8,753 | → |
| Decatur | County | 8,338 | 8,689 | 8,457 | → |
| Delaware | County | 18,035 | 18,422 | 17,764 | → |
| Des Moines | County | 42,614 | 42,359 | 40,325 | → |
| Dickinson | County | 14,909 | 16,429 | 16,667 | → |
| Dubuque | County | 86,403 | 89,133 | 93,653 | → |
| Emmet | County | 11,569 | 11,022 | 10,302 | → |
| Fayette | County | 21,843 | 22,020 | 20,880 | → |
| Floyd | County | 17,058 | 16,898 | 16,303 | → |
| Franklin | County | 11,364 | 10,700 | 10,680 | → |
| Fremont | County | 8,226 | 8,008 | 7,441 | → |
| Greene | County | 10,045 | 10,372 | 9,336 | → |
| Grundy | County | 12,029 | 12,370 | 12,453 | → |
| Guthrie | County | 10,935 | 11,348 | 10,954 | → |
| Hamilton | County | 16,071 | 16,435 | 15,673 | → |
| Hancock | County | 12,638 | 12,107 | 11,341 | → |
| Hardin | County | 19,094 | 18,806 | 17,534 | → |
| Harrison | County | 14,730 | 15,674 | 14,928 | → |
| Henry | County | 19,226 | 20,353 | 20,145 | → |
| Howard | County | 9,809 | 9,951 | 9,566 | → |
| Humboldt | County | 10,756 | 10,384 | 9,815 | → |
| Ida | County | 8,365 | 7,839 | 7,089 | → |
| Iowa | County | 14,630 | 15,680 | 16,355 | → |
| Jackson | County | 19,950 | 20,295 | 19,848 | → |
| Jasper | County | 34,795 | 37,229 | 36,842 | → |
| Jefferson | County | 16,310 | 16,180 | 16,843 | → |
| Johnson | County | 96,119 | 110,983 | 130,882 | → |
| Jones | County | 19,444 | 20,227 | 20,638 | → |
| Keokuk | County | 11,624 | 11,405 | 10,511 | → |
| Kossuth | County | 18,591 | 17,159 | 15,543 | → |
| Lee | County | 38,687 | 38,062 | 35,862 | → |
| Linn | County | 168,767 | 191,728 | 211,226 | → |
| Louisa | County | 11,592 | 12,188 | 11,387 | → |
| Lucas | County | 9,070 | 9,412 | 8,898 | → |
| Lyon | County | 11,952 | 11,763 | 11,581 | → |
| Madison | County | 12,483 | 14,012 | 15,679 | → |
| Mahaska | County | 21,532 | 22,319 | 22,381 | → |
| Marion | County | 30,001 | 32,048 | 33,309 | → |
| Marshall | County | 38,276 | 39,332 | 40,648 | → |
| Mills | County | 13,202 | 14,543 | 15,059 | → |
| Mitchell | County | 10,928 | 10,877 | 10,776 | → |
| Monona | County | 10,034 | 10,020 | 9,243 | → |
| Monroe | County | 8,114 | 8,012 | 7,970 | → |
| Montgomery | County | 12,076 | 11,775 | 10,740 | → |
| Muscatine | County | 39,907 | 41,723 | 42,745 | → |
| O'Brien | County | 15,444 | 15,096 | 14,398 | → |
| Osceola | County | 7,267 | 7,003 | 6,462 | → |
| Page | County | 16,870 | 16,982 | 15,932 | → |
| Palo Alto | County | 10,669 | 10,143 | 9,421 | → |
| Plymouth | County | 23,388 | 24,859 | 24,986 | → |
| Pocahontas | County | 9,525 | 8,664 | 7,310 | → |
| Polk | County | 327,140 | 374,258 | 430,640 | → |
| Pottawattamie | County | 82,628 | 87,825 | 93,158 | → |
| Poweshiek | County | 19,033 | 18,829 | 18,914 | → |
| Ringgold | County | 5,420 | 5,469 | 5,131 | → |
| Sac | County | 12,324 | 11,531 | 10,350 | → |
| Scott | County | 150,973 | 158,705 | 165,224 | → |
| Shelby | County | 13,230 | 13,064 | 12,167 | → |
| Sioux | County | 29,903 | 31,596 | 33,704 | → |
| Story | County | 74,252 | 79,988 | 89,542 | → |
| Tama | County | 17,419 | 18,099 | 17,767 | → |
| Taylor | County | 7,114 | 6,958 | 6,317 | → |
| Union | County | 12,750 | 12,312 | 12,534 | → |
| Van Buren | County | 7,676 | 7,800 | 7,570 | → |
| Wapello | County | 35,696 | 36,067 | 35,625 | → |
| Warren | County | 36,033 | 40,672 | 46,225 | → |
| Washington | County | 19,612 | 20,679 | 21,704 | → |
| Wayne | County | 7,067 | 6,732 | 6,403 | → |
| Webster | County | 40,342 | 40,230 | 38,013 | → |
| Winnebago | County | 12,122 | 11,717 | 10,866 | → |
| Winneshiek | County | 20,847 | 21,291 | 21,056 | → |
| Woodbury | County | 98,276 | 103,876 | 102,172 | → |
| Worth | County | 7,991 | 7,904 | 7,598 | → |
| Wright | County | 14,269 | 14,337 | 13,229 | → |
| Iowa | State | 2,776,831 | 2,926,538 | 3,046,355 |
Contents: Places
The population of all places in Iowa by census years.
The 
icon links to further information about a selected place including its population structure (gender, age groups, age distribution, »race«, ethnicity).
| Name | Status | County | Population Census 1990-04-01 | Population Census 2000-04-01 | Population Census 2010-04-01 | |
|---|---|---|---|---|---|---|
| Ackley | City | Franklin / Hardin | 1,719 | 1,807 | 1,589 | → |
| Ackworth | City | Warren | ... | 68 | 83 | → |
| Adair | City | Guthrie / Adair | 894 | 837 | 781 | → |
| Adel | City | Dallas | 3,401 | 3,435 | 3,682 | → |
| Afton | City | Union | 958 | 903 | 845 | → |
| Agency | City | Wapello | 660 | 626 | 638 | → |
| Ainsworth | City | Washington | 506 | 523 | 567 | → |
| Akron | City | Plymouth | 1,469 | 1,475 | 1,486 | → |
| Albert City | City | Buena Vista | 781 | 709 | 699 | → |
| Albia | City | Monroe | 4,060 | 3,775 | 3,766 | → |
| Albion | City | Marshall | 585 | 594 | 505 | → |
| Alburnett | City | Linn | 462 | 561 | 673 | → |
| Alden | City | Hardin | 860 | 930 | 787 | → |
| Alexander | City | Franklin | 172 | 169 | 175 | → |
| Algona | City | Kossuth | 6,200 | 5,731 | 5,560 | → |
| Alleman | City | Polk | 362 | 447 | 432 | → |
| Allerton | City | Wayne | 609 | 552 | 501 | → |
| Allison | City | Butler | 948 | 1,010 | 1,029 | → |
| Alta | City | Buena Vista | 1,854 | 1,852 | 1,883 | → |
| Alta Vista | City | Chickasaw | 250 | 288 | 266 | → |
| Alton | City | Sioux | 1,138 | 1,117 | 1,216 | → |
| Altoona | City | Polk | 7,390 | 10,382 | 14,541 | → |
| Alvord | City | Lyon | 194 | 185 | 196 | → |
| Amana | Census-Designated Place | Iowa | ... | ... | 442 | → |
| Ames | City | Story | 47,362 | 50,812 | 58,965 | → |
| Anamosa | City | Jones | 5,108 | 5,484 | 5,533 | → |
| Anderson | Census-Designated Place | Fremont | ... | ... | 65 | → |
| Andover | City | Clinton | ... | 84 | 103 | → |
| Andrew | City | Jackson | 312 | 464 | 434 | → |
| Anita | City | Cass | 1,089 | 1,058 | 972 | → |
| Ankeny | City | Polk | 18,590 | 27,520 | 45,582 | → |
| Anthon | City | Woodbury | 625 | 638 | 565 | → |
| Aplington | City | Butler | 1,135 | 1,056 | 1,128 | → |
| Arcadia | City | Carroll | 485 | 443 | 484 | → |
| Archer | City | O'Brien | 148 | 126 | 131 | → |
| Aredale | City | Butler | 93 | 88 | 74 | → |
| Arion | City | Crawford | 148 | 134 | 108 | → |
| Arispe | City | Union | 92 | 89 | 100 | → |
| Arlington | City | Fayette | 483 | 490 | 429 | → |
| Armstrong | City | Emmet | 1,006 | 980 | 926 | → |
| Arnolds Park | City | Dickinson | ... | 1,198 | 1,126 | → |
| Arthur | City | Ida | 272 | 245 | 206 | → |
| Asbury | City | Dubuque | 2,072 | 2,454 | 4,170 | → |
| Ashton | City | Osceola | 462 | 460 | 458 | → |
| Aspinwall | City | Crawford | ... | 58 | 40 | → |
| Atalissa | City | Muscatine | ... | 308 | 311 | → |
| Athelstan | Census-Designated Place | Taylor | 28 | 18 | 19 | → |
| Atkins | City | Benton | 732 | 985 | 1,670 | → |
| Atlantic | City | Cass | 7,523 | 7,260 | 7,112 | → |
| Auburn | City | Sac | 304 | 296 | 322 | → |
| Audubon | City | Audubon | 2,559 | 2,373 | 2,176 | → |
| Aurelia | City | Cherokee | 1,034 | 1,062 | 1,036 | → |
| Aurora | City | Buchanan | 203 | 194 | 185 | → |
| Avoca | City | Pottawattamie | 1,512 | 1,609 | 1,506 | → |
| Ayrshire | City | Palo Alto | 195 | 200 | 143 | → |
| Badger | City | Webster | 600 | 614 | 561 | → |
| Bagley | City | Guthrie | 319 | 354 | 303 | → |
| Baldwin | City | Jackson | 137 | 121 | 109 | → |
| Balltown | City | Dubuque | ... | 79 | 68 | → |
| Bancroft | City | Kossuth | 852 | 795 | 732 | → |
| Bankston | City | Dubuque | 29 | 27 | 25 | → |
| Barnes City | City | Poweshiek / Mahaska | 221 | 201 | 176 | → |
| Barnum | City | Webster | 160 | 198 | 191 | → |
| Bartlett | Census-Designated Place | Fremont | ... | ... | 50 | → |
| Bassett | City | Chickasaw | ... | 66 | 66 | → |
| Batavia | City | Jefferson | 535 | 496 | 499 | → |
| Battle Creek | City | Ida | 825 | 742 | 713 | → |
| Baxter | City | Jasper | 922 | 1,052 | 1,101 | → |
| Bayard | City | Guthrie | 506 | 530 | 471 | → |
| Beacon | City | Mahaska | ... | 546 | 494 | → |
| Beaconsfield | City | Ringgold | 27 | 11 | 15 | → |
| Beaman | City | Grundy | 183 | 210 | 191 | → |
| Beaver | City | Boone | 46 | 53 | 48 | → |
| Beaverdale | Census-Designated Place | Des Moines | ... | ... | 952 | → |
| Bedford | City | Taylor | 1,735 | 1,620 | 1,440 | → |
| Belle Plaine | City | Benton | 2,836 | 2,879 | 2,534 | → |
| Bellevue | City | Jackson | 2,286 | 2,358 | 2,191 | → |
| Belmond | City | Wright | 2,510 | 2,560 | 2,376 | → |
| Bennett | City | Cedar | 425 | 391 | 405 | → |
| Bentley | Census-Designated Place | Pottawattamie | ... | ... | 118 | → |
| Benton | City | Ringgold | 41 | 40 | 41 | → |
| Berkley | City | Boone | 36 | 24 | 32 | → |
| Bernard | City | Dubuque | ... | 102 | 112 | → |
| Bertram | City | Linn | ... | 267 | 294 | → |
| Bettendorf | City | Scott | 27,844 | 31,310 | 33,217 | → |
| Bevington | City | Madison / Warren | ... | 61 | 63 | → |
| Birmingham | City | Van Buren | 386 | 425 | 448 | → |
| Blairsburg | City | Hamilton | 269 | 235 | 215 | → |
| Blairstown | City | Benton | 677 | 687 | 692 | → |
| Blakesburg | City | Wapello | 302 | 377 | 296 | → |
| Blanchard | City | Page | ... | 70 | 38 | → |
| Blencoe | City | Monona | 258 | 227 | 224 | → |
| Blockton | City | Taylor | 175 | 186 | 192 | → |
| Bloomfield | City | Davis | 2,623 | 2,627 | 2,640 | → |
| Blue Grass | City | Scott / Muscatine | 1,212 | 1,178 | 1,452 | → |
| Bode | City | Humboldt | 355 | 337 | 302 | → |
| Bolan | Census-Designated Place | Worth | ... | ... | 33 | → |
| Bonaparte | City | Van Buren | 482 | 458 | 433 | → |
| Bondurant | City | Polk | 1,604 | 1,883 | 3,860 | → |
| Boone | City | Boone | 12,442 | 12,805 | 12,661 | → |
| Bouton | City | Dallas | 149 | 146 | 129 | → |
| Boxholm | City | Boone | 214 | 220 | 195 | → |
| Boyden | City | Sioux | ... | 678 | 707 | → |
| Braddyville | City | Page | 204 | 173 | 159 | → |
| Bradford | Census-Designated Place | Franklin | ... | ... | 99 | → |
| Bradgate | City | Humboldt | 121 | 107 | 86 | → |
| Brandon | City | Buchanan | 322 | 313 | 309 | → |
| Brayton | City | Audubon | 118 | 143 | 128 | → |
| Breda | City | Carroll | 467 | 479 | 483 | → |
| Bridgewater | City | Adair | 171 | 178 | 182 | → |
| Brighton | City | Washington | 684 | 683 | 652 | → |
| Bristow | City | Butler | 197 | 202 | 160 | → |
| Britt | City | Hancock | 2,215 | 2,058 | 2,069 | → |
| Bronson | City | Woodbury | 210 | 263 | 322 | → |
| Brooklyn | City | Poweshiek | 1,440 | 1,372 | 1,468 | → |
| Brunsville | City | Plymouth | 137 | 146 | 151 | → |
| Buck Grove | City | Crawford | 66 | 49 | 43 | → |
| Buckeye | City | Hardin | 105 | 110 | 108 | → |
| Buffalo | City | Scott | ... | 1,372 | 1,270 | → |
| Buffalo Center | City | Winnebago | 1,086 | 971 | 905 | → |
| Burchinal | Census-Designated Place | Cerro Gordo | ... | ... | 40 | → |
| Burlington | City | Des Moines | 27,439 | 26,854 | 25,663 | → |
| Burr Oak | Census-Designated Place | Winneshiek | ... | ... | 166 | → |
| Burt | City | Kossuth | 591 | 557 | 533 | → |
| Bussey | City | Marion | 507 | 455 | 422 | → |
| Calamus | City | Clinton | 379 | 396 | 439 | → |
| California Junction | Census-Designated Place | Harrison | ... | ... | 85 | → |
| Callender | City | Webster | 396 | 428 | 376 | → |
| Calmar | City | Winneshiek | 1,025 | 1,028 | 978 | → |
| Calumet | City | O'Brien | 160 | 182 | 170 | → |
| Camanche | City | Clinton | 4,488 | 4,198 | 4,448 | → |
| Cambridge | City | Story | 702 | 823 | 827 | → |
| Cantril | City | Van Buren | 271 | 260 | 222 | → |
| Carbon | City | Adams | ... | 27 | 34 | → |
| Carlisle | City | Polk / Warren | 3,286 | 3,583 | 3,876 | → |
| Carpenter | City | Mitchell | 99 | 130 | 109 | → |
| Carroll | City | Carroll | 9,687 | 10,120 | 10,103 | → |
| Carson | City | Pottawattamie | 753 | 670 | 812 | → |
| Carter Lake | City | Pottawattamie | 3,197 | 3,250 | 3,785 | → |
| Cascade | City | Dubuque / Jones | 1,796 | 1,997 | 2,159 | → |
| Casey | City | Guthrie / Adair | 434 | 475 | 426 | → |
| Castalia | City | Winneshiek | ... | 179 | 173 | → |
| Castana | City | Monona | 159 | 178 | 147 | → |
| Cedar Falls | City | Black Hawk | 33,857 | 36,158 | 39,260 | → |
| Cedar Rapids | City | Linn | 108,854 | 121,135 | 126,326 | → |
| Center Junction | City | Jones | 166 | 135 | 111 | → |
| Center Point | City | Linn | 1,711 | 1,998 | 2,421 | → |
| Centerville | City | Appanoose | 6,071 | 5,948 | 5,528 | → |
| Central City | City | Linn | 1,085 | 1,161 | 1,257 | → |
| Centralia | City | Dubuque | 118 | 100 | 134 | → |
| Chapin | Census-Designated Place | Franklin | ... | ... | 87 | → |
| Chariton | City | Lucas | 4,667 | 4,615 | 4,321 | → |
| Charles City | City | Floyd | 7,969 | 7,803 | 7,652 | → |
| Charlotte | City | Clinton | 338 | 426 | 394 | → |
| Charter Oak | City | Crawford | 506 | 532 | 502 | → |
| Chatsworth | City | Sioux | 103 | 89 | 79 | → |
| Chelsea | City | Tama | 355 | 288 | 267 | → |
| Cherokee | City | Cherokee | 6,046 | 5,356 | 5,253 | → |
| Chester | City | Howard | 172 | 149 | 127 | → |
| Chillicothe | City | Wapello | 160 | 90 | 97 | → |
| Churdan | City | Greene | 430 | 417 | 386 | → |
| Cincinnati | City | Appanoose | 363 | 427 | 357 | → |
| Clare | City | Webster | 169 | 189 | 146 | → |
| Clarence | City | Cedar | 936 | 1,007 | 974 | → |
| Clarinda | City | Page | 5,140 | 5,693 | 5,572 | → |
| Clarion | City | Wright | 2,717 | 2,974 | 2,850 | → |
| Clarksville | City | Butler | 1,377 | 1,440 | 1,439 | → |
| Clayton | City | Clayton | ... | 60 | 43 | → |
| Clear Lake | City | Cerro Gordo | 8,606 | 8,172 | 7,777 | → |
| Clearfield | City | Taylor / Ringgold | 373 | 380 | 363 | → |
| Cleghorn | City | Cherokee | 275 | 250 | 240 | → |
| Clemons | City | Marshall | 173 | 148 | 148 | → |
| Clermont | City | Fayette | 734 | 720 | 632 | → |
| Climbing Hill | Census-Designated Place | Woodbury | ... | ... | 97 | → |
| Clinton | City | Clinton | 29,537 | 27,774 | 26,885 | → |
| Clio | City | Wayne | 103 | 91 | 80 | → |
| Clive | City | Polk / Dallas | 7,515 | 12,809 | 15,447 | → |
| Clutier | City | Tama | 202 | 229 | 213 | → |
| Coalville | Census-Designated Place | Webster | ... | 591 | 610 | → |
| Coburg | City | Montgomery | 72 | 31 | 42 | → |
| Coggon | City | Linn | 653 | 727 | 658 | → |
| Coin | City | Page | 213 | 246 | 193 | → |
| Colesburg | City | Delaware | 413 | 414 | 404 | → |
| Colfax | City | Jasper | 2,518 | 2,300 | 2,093 | → |
| College Springs | City | Page | ... | 237 | 214 | → |
| Collins | City | Story | 467 | 499 | 495 | → |
| Colo | City | Story | 795 | 878 | 876 | → |
| Columbus City | City | Louisa | 336 | 373 | 391 | → |
| Columbus Junction | City | Louisa | 1,724 | 1,919 | 1,899 | → |
| Colwell | City | Floyd | 94 | 80 | 73 | → |
| Conesville | City | Muscatine | 337 | 424 | 432 | → |
| Conrad | City | Grundy | 969 | 1,051 | 1,108 | → |
| Conroy | Census-Designated Place | Iowa | ... | ... | 259 | → |
| Conway | City | Taylor | 51 | 63 | 41 | → |
| Coon Rapids | City | Guthrie / Carroll | 1,329 | 1,305 | 1,305 | → |
| Coppock | City | Jefferson / Washington / Henry | ... | 51 | 47 | → |
| Coralville | City | Johnson | 10,682 | 15,192 | 18,907 | → |
| Corley | Census-Designated Place | Shelby | ... | ... | 26 | → |
| Corning | City | Adams | 1,838 | 1,804 | 1,635 | → |
| Correctionville | City | Woodbury | 920 | 847 | 821 | → |
| Corwith | City | Hancock | 354 | 360 | 309 | → |
| Corydon | City | Wayne | 1,705 | 1,596 | 1,585 | → |
| Cotter | City | Louisa | ... | 55 | 48 | → |
| Coulter | City | Franklin | 263 | 263 | 281 | → |
| Council Bluffs | City | Pottawattamie | 54,773 | 58,269 | 62,230 | → |
| Craig | City | Plymouth | 116 | 102 | 89 | → |
| Crawfordsville | City | Washington | 298 | 292 | 264 | → |
| Crescent | City | Pottawattamie | ... | 540 | 617 | → |
| Cresco | City | Howard | 3,687 | 3,920 | 3,868 | → |
| Creston | City | Union | 7,932 | 7,615 | 7,834 | → |
| Cromwell | City | Union | 120 | 121 | 107 | → |
| Crystal Lake | City | Hancock | 241 | 288 | 250 | → |
| Cumberland | City | Cass | 295 | 281 | 262 | → |
| Cumming | City | Warren | 143 | 160 | 351 | → |
| Curlew | City | Palo Alto | 56 | 61 | 58 | → |
| Cushing | City | Woodbury | 230 | 246 | 220 | → |
| Cylinder | City | Palo Alto | 112 | 110 | 88 | → |
| Dakota City | City | Humboldt | 1,063 | 897 | 843 | → |
| Dallas Center | City | Dallas | 1,496 | 1,592 | 1,623 | → |
| Dana | City | Greene | 71 | 84 | 71 | → |
| Danbury | City | Woodbury | 449 | 384 | 348 | → |
| Danville | City | Des Moines | 937 | 918 | 934 | → |
| Davenport | City | Scott | 95,722 | 98,298 | 99,685 | → |
| Davis City | City | Decatur | 257 | 274 | 204 | → |
| Dawson | City | Dallas | 174 | 155 | 131 | → |
| Dayton | City | Webster | 793 | 888 | 837 | → |
| De Soto | City | Dallas | 1,033 | 1,006 | 1,050 | → |
| De Witt | City | Clinton | 4,633 | 5,061 | 5,322 | → |
| Decatur City | City | Decatur | 177 | 199 | 197 | → |
| Decorah | City | Winneshiek | 8,150 | 8,211 | 8,127 | → |
| Dedham | City | Carroll | 264 | 281 | 266 | → |
| Deep River | City | Poweshiek | 345 | 286 | 279 | → |
| Defiance | City | Shelby | 312 | 350 | 284 | → |
| Delaware | City | Delaware | ... | 195 | 159 | → |
| Delhi | City | Delaware | 544 | 460 | 460 | → |
| Delmar | City | Clinton | 535 | 504 | 525 | → |
| Deloit | City | Crawford | 336 | 280 | 264 | → |
| Delphos | City | Ringgold | 23 | 25 | 25 | → |
| Delta | City | Keokuk | 398 | 412 | 328 | → |
| Denison | City | Crawford | 6,642 | 7,355 | 8,298 | → |
| Denmark | Census-Designated Place | Lee | ... | ... | 423 | → |
| Denver | City | Bremer | 1,617 | 1,645 | 1,780 | → |
| Derby | City | Lucas | 135 | 131 | 115 | → |
| Des Moines | City | Polk / Warren | 193,333 | 199,173 | 203,433 | → |
| Dexter | City | Dallas | 630 | 694 | 611 | → |
| Diagonal | City | Ringgold | 298 | 312 | 330 | → |
| Diamondhead Lake | Census-Designated Place | Guthrie | ... | ... | 366 | → |
| Dickens | City | Clay | 214 | 200 | 185 | → |
| Dike | City | Grundy | 869 | 952 | 1,209 | → |
| Dixon | City | Scott | ... | 267 | 247 | → |
| Dolliver | City | Emmet | 103 | 77 | 66 | → |
| Donahue | City | Scott | 318 | 296 | 346 | → |
| Donnellson | City | Lee | 941 | 973 | 912 | → |
| Doon | City | Lyon | 630 | 534 | 577 | → |
| Douds | Census-Designated Place | Van Buren | ... | 165 | 152 | → |
| Dougherty | City | Cerro Gordo | 107 | 79 | 58 | → |
| Dow City | City | Crawford | 445 | 507 | 510 | → |
| Dows | City | Franklin / Wright | 660 | 682 | 538 | → |
| Drakesville | City | Davis | ... | 197 | 184 | → |
| Dubuque | City | Dubuque | 57,753 | 57,856 | 57,637 | → |
| Dumont | City | Butler | 700 | 678 | 637 | → |
| Duncan | Census-Designated Place | Hancock | ... | ... | 131 | → |
| Duncombe | City | Webster | 464 | 474 | 410 | → |
| Dundee | City | Delaware | 179 | 181 | 174 | → |
| Dunkerton | City | Black Hawk | 737 | 771 | 852 | → |
| Dunlap | City | Harrison / Crawford | 1,297 | 1,144 | 1,042 | → |
| Durango | City | Dubuque | ... | 45 | 22 | → |
| Durant | City | Muscatine / Cedar / Scott | 1,556 | 1,674 | 1,832 | → |
| Dyersville | City | Dubuque / Delaware | 3,706 | 4,050 | 4,058 | → |
| Dysart | City | Tama | 1,229 | 1,302 | 1,379 | → |
| Eagle Grove | City | Wright | 3,676 | 3,718 | 3,583 | → |
| Earlham | City | Madison | 1,167 | 1,298 | 1,450 | → |
| Earling | City | Shelby | 460 | 463 | 437 | → |
| Earlville | City | Delaware | 870 | 892 | 812 | → |
| Early | City | Sac | 631 | 605 | 557 | → |
| East Amana | Census-Designated Place | Iowa | ... | ... | 56 | → |
| East Peru | City | Madison | 132 | 155 | 125 | → |
| Eddyville | City | Monroe / Wapello / Mahaska | 1,042 | 1,064 | 1,024 | → |
| Edgewood | City | Clayton / Delaware | 837 | 923 | 864 | → |
| Elberon | City | Tama | 203 | 245 | 196 | → |
| Eldon | City | Wapello | 1,048 | 1,004 | 927 | → |
| Eldora | City | Hardin | 3,041 | 3,037 | 2,732 | → |
| Eldridge | City | Scott | 3,567 | 4,165 | 5,651 | → |
| Elgin | City | Fayette | 594 | 683 | 683 | → |
| Elk Horn | City | Shelby | 665 | 649 | 662 | → |
| Elk Run Heights | City | Black Hawk | ... | 1,114 | 1,117 | → |
| Elkader | City | Clayton | 1,532 | 1,446 | 1,273 | → |
| Elkhart | City | Polk | 372 | 362 | 683 | → |
| Elkport | City | Clayton | ... | 118 | 37 | → |
| Elliott | City | Montgomery | 447 | 402 | 350 | → |
| Ellston | City | Ringgold | 44 | 57 | 43 | → |
| Ellsworth | City | Hamilton | 449 | 532 | 531 | → |
| Elma | City | Howard | 662 | 601 | 546 | → |
| Ely | City | Linn | 515 | 1,159 | 1,776 | → |
| Emerson | City | Mills | 472 | 481 | 438 | → |
| Emmetsburg | City | Palo Alto | 3,971 | 3,971 | 3,904 | → |
| Epworth | City | Dubuque | 1,345 | 1,442 | 1,860 | → |
| Essex | City | Page | 886 | 884 | 798 | → |
| Estherville | City | Emmet | 6,775 | 6,652 | 6,360 | → |
| Evansdale | City | Black Hawk | 4,679 | 4,525 | 4,751 | → |
| Everly | City | Clay | 677 | 642 | 603 | → |
| Exira | City | Audubon | 944 | 810 | 840 | → |
| Exline | City | Appanoose | 187 | 196 | 160 | → |
| Fairbank | City | Fayette / Buchanan | 1,009 | 1,043 | 1,113 | → |
| Fairfax | City | Linn | ... | 886 | 2,123 | → |
| Fairfield | City | Jefferson | 9,998 | 9,660 | 9,464 | → |
| Farley | City | Dubuque | 1,371 | 1,355 | 1,537 | → |
| Farmersburg | City | Clayton | 298 | 300 | 302 | → |
| Farmington | City | Van Buren | 697 | 755 | 664 | → |
| Farnhamville | City | Calhoun / Webster | 414 | 434 | 371 | → |
| Farragut | City | Fremont | 509 | 522 | 485 | → |
| Fayette | City | Fayette | ... | 1,356 | 1,338 | → |
| Fenton | City | Kossuth | 352 | 317 | 279 | → |
| Ferguson | City | Marshall | 166 | 128 | 126 | → |
| Fertile | City | Worth | 382 | 357 | 370 | → |
| Floris | City | Davis | 172 | 149 | 138 | → |
| Floyd | City | Floyd | 337 | 364 | 335 | → |
| Fonda | City | Pocahontas | 738 | 642 | 631 | → |
| Fontanelle | City | Adair | 840 | 687 | 672 | → |
| Forest City | City | Winnebago / Hancock | 4,450 | 4,397 | 4,151 | → |
| Fort Atkinson | City | Winneshiek | 367 | 398 | 349 | → |
| Fort Dodge | City | Webster | ... | 26,295 | 25,206 | → |
| Fort Madison | City | Lee | ... | 11,655 | 11,051 | → |
| Fostoria | City | Clay | 197 | 217 | 231 | → |
| Franklin | City | Lee | 110 | 136 | 143 | → |
| Fraser | City | Boone | 116 | 137 | 102 | → |
| Fredericksburg | City | Chickasaw | 985 | 978 | 931 | → |
| Frederika | City | Bremer | 196 | 197 | 183 | → |
| Fredonia | City | Louisa | 161 | 247 | 244 | → |
| Fremont | City | Mahaska | ... | 733 | 743 | → |
| Fruitland | City | Muscatine | 446 | 714 | 977 | → |
| Frytown | Census-Designated Place | Johnson | ... | ... | 165 | → |
| Galt | City | Wright | 43 | 30 | 32 | → |
| Galva | City | Ida | 398 | 368 | 434 | → |
| Garber | City | Clayton | 117 | 105 | 88 | → |
| Garden City | Census-Designated Place | Hardin | ... | ... | 89 | → |
| Garden Grove | City | Decatur | 229 | 250 | 211 | → |
| Garnavillo | City | Clayton | 717 | 749 | 745 | → |
| Garner | City | Hancock | 3,003 | 2,928 | 3,129 | → |
| Garrison | City | Benton | 323 | 413 | 371 | → |
| Garwin | City | Tama | 533 | 565 | 527 | → |
| Geneva | City | Franklin | 174 | 169 | 165 | → |
| George | City | Lyon | 1,111 | 1,050 | 1,080 | → |
| Gibson | City | Keokuk | ... | 89 | 61 | → |
| Gilbert | City | Story | 790 | 999 | 1,082 | → |
| Gilbertville | City | Black Hawk | 748 | 773 | 712 | → |
| Gillett Grove | City | Clay | 67 | 57 | 49 | → |
| Gilman | City | Marshall | 550 | 599 | 509 | → |
| Gilmore City | City | Humboldt / Pocahontas | 523 | 550 | 504 | → |
| Gladbrook | City | Tama | 867 | 1,014 | 945 | → |
| Glenwood | City | Mills | 5,374 | 5,415 | 5,269 | → |
| Glidden | City | Carroll | 1,095 | 1,128 | 1,146 | → |
| Goldfield | City | Wright | 713 | 678 | 635 | → |
| Goodell | City | Hancock | 198 | 174 | 139 | → |
| Goose Lake | City | Clinton | 188 | 227 | 240 | → |
| Gowrie | City | Webster | 1,028 | 1,038 | 1,037 | → |
| Graettinger | City | Palo Alto | 818 | 904 | 844 | → |
| Graf | City | Dubuque | ... | 77 | 79 | → |
| Grafton | City | Worth | 245 | 290 | 252 | → |
| Grand Junction | City | Greene | 819 | 968 | 824 | → |
| Grand Mound | City | Clinton | 615 | 678 | 642 | → |
| Grand River | City | Decatur | 171 | 225 | 236 | → |
| Grandview | City | Louisa | 518 | 614 | 556 | → |
| Granger | City | Dallas / Polk | ... | 606 | 1,244 | → |
| Grant | City | Montgomery | 123 | 99 | 92 | → |
| Granville | City | Sioux | 257 | 325 | 312 | → |
| Gravity | City | Taylor | 220 | 218 | 188 | → |
| Gray | City | Audubon | 83 | 82 | 63 | → |
| Greeley | City | Delaware | ... | 285 | 256 | → |
| Green Mountain | Census-Designated Place | Marshall | ... | ... | 126 | → |
| Greene | City | Butler / Floyd | 1,139 | 1,105 | 1,130 | → |
| Greenfield | City | Adair | 2,114 | 2,127 | 1,982 | → |
| Greenville | City | Clay | 84 | 94 | 75 | → |
| Grimes | City | Polk / Dallas | 2,677 | 5,121 | 8,246 | → |
| Grinnell | City | Poweshiek | 8,978 | 9,120 | 9,218 | → |
| Griswold | City | Cass | 1,049 | 1,033 | 1,036 | → |
| Grundy Center | City | Grundy | 2,588 | 2,594 | 2,706 | → |
| Gruver | City | Emmet | ... | 113 | 94 | → |
| Guernsey | City | Poweshiek | 70 | 66 | 63 | → |
| Guthrie Center | City | Guthrie | 1,663 | 1,663 | 1,569 | → |
| Guttenberg | City | Clayton | 2,273 | 2,000 | 1,919 | → |
| Halbur | City | Carroll | ... | 205 | 246 | → |
| Hamburg | City | Fremont | 1,381 | 1,247 | 1,187 | → |
| Hamilton | City | Marion | 115 | 142 | 130 | → |
| Hampton | City | Franklin | 4,150 | 4,222 | 4,461 | → |
| Hancock | City | Pottawattamie | 196 | 207 | 196 | → |
| Hanlontown | City | Worth | 193 | 232 | 226 | → |
| Hansell | City | Franklin | ... | 101 | 98 | → |
| Harcourt | City | Webster | 259 | 340 | 303 | → |
| Hardy | City | Humboldt | 44 | 57 | 47 | → |
| Harlan | City | Shelby | 5,249 | 5,295 | 5,106 | → |
| Harper | City | Keokuk | 147 | 134 | 114 | → |
| Harpers Ferry | City | Allamakee | 281 | 328 | 328 | → |
| Harris | City | Osceola | 177 | 200 | 170 | → |
| Hartford | City | Warren | 769 | 759 | 771 | → |
| Hartley | City | O'Brien | 1,636 | 1,738 | 1,672 | → |
| Hartwick | City | Poweshiek | 115 | 83 | 86 | → |
| Harvey | City | Marion | 235 | 277 | 235 | → |
| Hastings | City | Mills | 194 | 219 | 152 | → |
| Havelock | City | Pocahontas | 217 | 179 | 138 | → |
| Haverhill | City | Marshall | 94 | 170 | 173 | → |
| Hawarden | City | Sioux | 2,463 | 2,481 | 2,546 | → |
| Hawkeye | City | Fayette | 461 | 497 | 449 | → |
| Hayesville | City | Keokuk | ... | 57 | 50 | → |
| Hayfield | Census-Designated Place | Hancock | ... | ... | 43 | → |
| Hazleton | City | Buchanan | 737 | 948 | 823 | → |
| Hedrick | City | Keokuk | 825 | 846 | 764 | → |
| Henderson | City | Mills | 182 | 169 | 185 | → |
| Hepburn | City | Page | 58 | 39 | 23 | → |
| Hiawatha | City | Linn | 5,446 | 6,538 | 7,024 | → |
| High Amana | Census-Designated Place | Iowa | ... | ... | 115 | → |
| Hills | City | Johnson | 662 | 675 | 703 | → |
| Hillsboro | City | Henry | ... | 193 | 180 | → |
| Hinton | City | Plymouth | 695 | 788 | 928 | → |
| Holiday Lake | Census-Designated Place | Poweshiek | ... | ... | 433 | → |
| Holland | City | Grundy | 215 | 250 | 282 | → |
| Holstein | City | Ida | 1,456 | 1,469 | 1,396 | → |
| Holy Cross | City | Dubuque | 293 | 339 | 374 | → |
| Homestead | Census-Designated Place | Iowa | ... | ... | 148 | → |
| Hopkinton | City | Delaware | 692 | 683 | 628 | → |
| Hornick | City | Woodbury | 213 | 248 | 225 | → |
| Hospers | City | Sioux | 663 | 672 | 698 | → |
| Houghton | City | Lee | 120 | 132 | 146 | → |
| Hubbard | City | Hardin | 814 | 884 | 845 | → |
| Hudson | City | Black Hawk | 2,010 | 2,105 | 2,282 | → |
| Hull | City | Sioux | 1,745 | 1,972 | 2,175 | → |
| Humboldt | City | Humboldt | 4,590 | 4,465 | 4,690 | → |
| Humeston | City | Wayne | 580 | 547 | 494 | → |
| Hutchins | Census-Designated Place | Hancock | ... | ... | 28 | → |
| Huxley | City | Story | 2,086 | 2,328 | 3,317 | → |
| Ida Grove | City | Ida | 2,378 | 2,351 | 2,142 | → |
| Imogene | City | Fremont | 82 | 66 | 72 | → |
| Independence | City | Buchanan | 6,074 | 5,973 | 5,966 | → |
| Indianola | City | Warren | 11,106 | 13,169 | 14,782 | → |
| Inwood | City | Lyon | 816 | 872 | 814 | → |
| Ionia | City | Chickasaw | 298 | 280 | 291 | → |
| Iowa City | City | Johnson | 59,780 | 62,356 | 67,862 | → |
| Iowa Falls | City | Hardin | 5,504 | 5,189 | 5,238 | → |
| Ireton | City | Sioux | 627 | 586 | 609 | → |
| Irvington | Census-Designated Place | Kossuth | ... | ... | 38 | → |
| Irwin | City | Shelby | 394 | 372 | 341 | → |
| Jackson Junction | City | Winneshiek | 89 | 60 | 58 | → |
| Jacksonville | Census-Designated Place | Shelby | ... | ... | 30 | → |
| Jamaica | City | Guthrie | 232 | 237 | 224 | → |
| Janesville | City | Bremer / Black Hawk | 901 | 827 | 930 | → |
| Jefferson | City | Greene | 4,380 | 4,628 | 4,345 | → |
| Jesup | City | Buchanan / Black Hawk | 2,088 | 2,206 | 2,520 | → |
| Jewell Junction | City | Hamilton | 1,127 | 1,239 | 1,215 | → |
| Johnston | City | Polk | ... | 8,912 | 17,278 | → |
| Joice | City | Worth | 245 | 231 | 222 | → |
| Jolley | City | Calhoun | 55 | 52 | 41 | → |
| Kalona | City | Washington | 1,960 | 2,301 | 2,363 | → |
| Kamrar | City | Hamilton | 217 | 229 | 199 | → |
| Kanawha | City | Hancock | 779 | 739 | 652 | → |
| Kellerton | City | Ringgold | 314 | 372 | 315 | → |
| Kelley | City | Story | ... | 302 | 309 | → |
| Kellogg | City | Jasper | 703 | 611 | 599 | → |
| Kensett | City | Worth | 349 | 286 | 266 | → |
| Kent | Census-Designated Place | Union | ... | ... | 61 | → |
| Keokuk | City | Lee | 12,859 | 11,400 | 10,780 | → |
| Keomah Village | City | Mahaska | 99 | 88 | 84 | → |
| Keosauqua | City | Van Buren | 1,030 | 1,069 | 1,006 | → |
| Keota | City | Keokuk | 1,000 | 1,024 | 1,009 | → |
| Keswick | City | Keokuk | 284 | 295 | 246 | → |
| Keystone | City | Benton | 568 | 687 | 622 | → |
| Kimballton | City | Audubon | 289 | 342 | 322 | → |
| Kingsley | City | Plymouth | 1,143 | 1,250 | 1,411 | → |
| Kinross | City | Keokuk | 89 | 80 | 73 | → |
| Kirkman | City | Shelby | 98 | 76 | 64 | → |
| Kirkville | City | Wapello | 176 | 212 | 167 | → |
| Kiron | City | Crawford | 301 | 268 | 279 | → |
| Klemme | City | Hancock | 587 | 593 | 507 | → |
| Knierim | City | Calhoun | 71 | 69 | 60 | → |
| Knoxville | City | Marion | 8,320 | 7,743 | 7,313 | → |
| La Motte | City | Jackson | ... | 287 | 260 | → |
| La Porte City | City | Black Hawk | 2,122 | 2,324 | 2,285 | → |
| Lacona | City | Warren | 357 | 357 | 361 | → |
| Ladora | City | Iowa | 308 | 287 | 283 | → |
| Lake City | City | Calhoun | 1,855 | 1,818 | 1,727 | → |
| Lake Mills | City | Winnebago | 2,191 | 2,140 | 2,100 | → |
| Lake Panorama | Census-Designated Place | Guthrie | ... | ... | 1,309 | → |
| Lake Park | City | Dickinson | 960 | 1,027 | 1,105 | → |
| Lake View | City | Sac | ... | 1,323 | 1,142 | → |
| Lakeside | City | Buena Vista | 520 | 484 | 596 | → |
| Lakota | City | Kossuth | 281 | 254 | 255 | → |
| Lambs Grove | City | Jasper | 300 | 235 | 172 | → |
| Lamoni | City | Decatur | 2,329 | 2,478 | 2,324 | → |
| Lamont | City | Buchanan | 488 | 500 | 461 | → |
| Lanesboro | City | Carroll | 182 | 150 | 121 | → |
| Lansing | City | Allamakee | 1,033 | 1,032 | 999 | → |
| Larchwood | City | Lyon | 765 | 790 | 866 | → |
| Larrabee | City | Cherokee | 186 | 149 | 132 | → |
| Latimer | City | Franklin | 427 | 534 | 507 | → |
| Laurel | City | Marshall | ... | 255 | 239 | → |
| Laurens | City | Pocahontas | 1,569 | 1,455 | 1,258 | → |
| Lawler | City | Chickasaw | 517 | 461 | 439 | → |
| Lawton | City | Woodbury | 521 | 703 | 908 | → |
| Le Claire | City | Scott | 2,772 | 2,884 | 3,765 | → |
| Le Grand | City | Marshall / Tama | 826 | 879 | 938 | → |
| Le Mars | City | Plymouth | 8,690 | 9,240 | 9,826 | → |
| Le Roy | City | Decatur | 34 | 13 | 15 | → |
| Leando | Census-Designated Place | Van Buren | ... | 135 | 115 | → |
| Ledyard | City | Kossuth | 164 | 147 | 130 | → |
| Lehigh | City | Webster | 520 | 503 | 416 | → |
| Leighton | City | Mahaska | ... | 178 | 162 | → |
| Leland | City | Winnebago | 321 | 258 | 289 | → |
| Lenox | City | Taylor / Adams | 1,306 | 1,401 | 1,407 | → |
| Leon | City | Decatur | 2,076 | 1,980 | 1,977 | → |
| Lester | City | Lyon | 252 | 251 | 294 | → |
| Letts | City | Louisa | 374 | 396 | 384 | → |
| Lewis | City | Cass | 433 | 445 | 433 | → |
| Libertyville | City | Jefferson | 264 | 320 | 315 | → |
| Lidderdale | City | Carroll | ... | 179 | 180 | → |
| Lime Springs | City | Howard | 442 | 498 | 505 | → |
| Lincoln | City | Tama | 188 | 182 | 162 | → |
| Linden | City | Dallas | 201 | 226 | 199 | → |
| Lineville | City | Wayne | 289 | 268 | 217 | → |
| Linn Grove | City | Buena Vista | 209 | 211 | 154 | → |
| Lisbon | City | Linn | 1,352 | 1,904 | 2,152 | → |
| Liscomb | City | Marshall | 249 | 272 | 301 | → |
| Little Cedar | Census-Designated Place | Mitchell | ... | ... | 60 | → |
| Little Rock | City | Lyon | 458 | 489 | 459 | → |
| Little Sioux | City | Harrison | 206 | 217 | 170 | → |
| Livermore | City | Humboldt | 436 | 426 | 384 | → |
| Lockridge | City | Jefferson | ... | 284 | 268 | → |
| Logan | City | Harrison | 1,393 | 1,564 | 1,534 | → |
| Lohrville | City | Calhoun | 502 | 427 | 368 | → |
| Lone Rock | City | Kossuth | 173 | 157 | 146 | → |
| Lone Tree | City | Johnson | 962 | 1,208 | 1,300 | → |
| Long Grove | City | Scott | ... | 571 | 808 | → |
| Lorimor | City | Union | 377 | 427 | 360 | → |
| Lost Nation | City | Clinton | 465 | 501 | 446 | → |
| Loveland | Census-Designated Place | Pottawattamie | ... | ... | 35 | → |
| Lovilia | City | Monroe | 557 | 581 | 538 | → |
| Low Moor | City | Clinton | ... | 287 | 288 | → |
| Lowden | City | Cedar | 726 | 797 | 789 | → |
| Lu Verne | City | Humboldt / Kossuth | 342 | 303 | 261 | → |
| Luana | City | Clayton | 190 | 249 | 269 | → |
| Lucas | City | Lucas | 224 | 243 | 216 | → |
| Luther | City | Boone | 145 | 158 | 122 | → |
| Luxemburg | City | Dubuque | 257 | 254 | 240 | → |
| Luzerne | City | Benton | ... | 96 | 96 | → |
| Lynnville | City | Jasper | 393 | 380 | 379 | → |
| Lytton | City | Sac / Calhoun | 320 | 305 | 315 | → |
| Macedonia | City | Pottawattamie | 249 | 328 | 246 | → |
| Macksburg | City | Madison | 110 | 141 | 113 | → |
| Madrid | City | Boone | ... | 2,247 | 2,543 | → |
| Magnolia | City | Harrison | 173 | 195 | 183 | → |
| Maharishi Vedic City | City | Jefferson | ... | 91 | 259 | → |
| Malcom | City | Poweshiek | 447 | 350 | 287 | → |
| Mallard | City | Palo Alto | 365 | 290 | 274 | → |
| Maloy | City | Ringgold | 36 | 30 | 29 | → |
| Malvern | City | Mills | 1,212 | 1,253 | 1,142 | → |
| Manchester | City | Delaware | 5,196 | 5,274 | 5,179 | → |
| Manilla | City | Crawford | 856 | 846 | 776 | → |
| Manly | City | Worth | 1,360 | 1,344 | 1,323 | → |
| Manning | City | Carroll | 1,504 | 1,520 | 1,500 | → |
| Manson | City | Calhoun | 1,822 | 1,891 | 1,690 | → |
| Mapleton | City | Monona | ... | 1,337 | 1,224 | → |
| Maquoketa | City | Jackson / Clinton | 6,237 | 6,116 | 6,141 | → |
| Marathon | City | Buena Vista | 320 | 300 | 237 | → |
| Marble Rock | City | Floyd | 359 | 326 | 307 | → |
| Marcus | City | Cherokee | 1,173 | 1,137 | 1,117 | → |
| Marengo | City | Iowa | 2,377 | 2,540 | 2,528 | → |
| Marion | City | Linn | 20,479 | 26,636 | 34,768 | → |
| Marne | City | Cass | 149 | 149 | 120 | → |
| Marquette | City | Clayton | ... | 427 | 375 | → |
| Marshalltown | City | Marshall | 25,347 | 26,048 | 27,552 | → |
| Martelle | City | Jones | 290 | 276 | 255 | → |
| Martensdale | City | Warren | 487 | 473 | 465 | → |
| Martinsburg | City | Keokuk | 155 | 121 | 112 | → |
| Marysville | City | Marion | ... | 59 | 66 | → |
| Mason City | City | Cerro Gordo | 29,289 | 29,250 | 28,079 | → |
| Masonville | City | Delaware | 132 | 104 | 127 | → |
| Massena | City | Cass | 372 | 410 | 355 | → |
| Matlock | City | Sioux | 105 | 83 | 87 | → |
| Maurice | City | Sioux | 260 | 254 | 275 | → |
| Maxwell | City | Story | 812 | 808 | 920 | → |
| Maynard | City | Fayette | 491 | 501 | 518 | → |
| Maysville | City | Scott | 173 | 163 | 176 | → |
| McCallsburg | City | Story | 292 | 314 | 333 | → |
| McCausland | City | Scott | 308 | 305 | 291 | → |
| McClelland | City | Pottawattamie | 139 | 129 | 151 | → |
| McGregor | City | Clayton | 800 | 867 | 871 | → |
| McIntire | City | Mitchell | ... | 166 | 122 | → |
| Mechanicsville | City | Cedar | 1,080 | 1,177 | 1,146 | → |
| Mediapolis | City | Des Moines | 1,637 | 1,642 | 1,560 | → |
| Melbourne | City | Marshall | 756 | 792 | 830 | → |
| Melcher-Dallas | City | Marion | 1,321 | 1,296 | 1,288 | → |
| Melrose | City | Monroe | 150 | 133 | 112 | → |
| Melvin | City | Osceola | 244 | 241 | 214 | → |
| Menlo | City | Guthrie | 368 | 365 | 353 | → |
| Meriden | City | Cherokee | 189 | 184 | 159 | → |
| Merrill | City | Plymouth | 719 | 767 | 755 | → |
| Meservey | City | Cerro Gordo | 280 | 249 | 256 | → |
| Meyer | Census-Designated Place | Mitchell | ... | ... | 31 | → |
| Middle Amana | Census-Designated Place | Iowa | ... | ... | 581 | → |
| Middletown | City | Des Moines | 390 | 538 | 318 | → |
| Miles | City | Jackson | 383 | 462 | 445 | → |
| Milford | City | Dickinson | 2,148 | 2,573 | 2,898 | → |
| Miller | Census-Designated Place | Hancock | ... | ... | 60 | → |
| Millersburg | City | Iowa | ... | 193 | 159 | → |
| Millerton | City | Wayne | 44 | 48 | 45 | → |
| Millville | City | Clayton | 34 | 23 | 30 | → |
| Milo | City | Warren | 860 | 839 | 775 | → |
| Milton | City | Van Buren | 509 | 558 | 443 | → |
| Minburn | City | Dallas | 348 | 391 | 365 | → |
| Minden | City | Pottawattamie | 532 | 553 | 599 | → |
| Mineola | Census-Designated Place | Mills | ... | ... | 166 | → |
| Mingo | City | Jasper | 252 | 269 | 302 | → |
| Missouri Valley | City | Harrison | 2,909 | 3,065 | 2,838 | → |
| Mitchell | City | Mitchell | 279 | 152 | 138 | → |
| Mitchellville | City | Polk / Jasper | ... | 2,040 | 2,254 | → |
| Modale | City | Harrison | 290 | 303 | 283 | → |
| Mona | Census-Designated Place | Mitchell | ... | ... | 34 | → |
| Mondamin | City | Harrison | 459 | 423 | 402 | → |
| Monmouth | City | Jackson | 169 | 180 | 153 | → |
| Monona | City | Clayton | 1,519 | 1,556 | 1,549 | → |
| Monroe | City | Jasper | 1,747 | 1,812 | 1,830 | → |
| Montezuma | City | Poweshiek | 1,690 | 1,455 | 1,462 | → |
| Monticello | City | Jones | 3,551 | 3,675 | 3,796 | → |
| Montour | City | Tama | 312 | 280 | 249 | → |
| Montrose | City | Lee | 947 | 963 | 898 | → |
| Moorhead | City | Monona | 291 | 234 | 226 | → |
| Moorland | City | Webster | 279 | 199 | 169 | → |
| Moravia | City | Appanoose / Monroe | 679 | 712 | 665 | → |
| Morley | City | Jones | 85 | 93 | 115 | → |
| Morning Sun | City | Louisa | 843 | 881 | 836 | → |
| Morrison | City | Grundy | 120 | 97 | 94 | → |
| Moulton | City | Appanoose | 575 | 658 | 605 | → |
| Mount Auburn | City | Benton | 141 | 160 | 150 | → |
| Mount Ayr | City | Ringgold | ... | 1,934 | 1,691 | → |
| Mount Pleasant | City | Henry | 8,020 | 8,763 | 8,668 | → |
| Mount Sterling | City | Van Buren | 53 | 39 | 36 | → |
| Mount Union | City | Henry | 166 | 132 | 107 | → |
| Mount Vernon | City | Linn | ... | 3,809 | 4,506 | → |
| Moville | City | Woodbury | 1,297 | 1,593 | 1,618 | → |
| Murray | City | Clarke | 734 | 762 | 756 | → |
| Muscatine | City | Muscatine | 22,967 | 22,749 | 22,886 | → |
| Mystic | City | Appanoose | 545 | 588 | 425 | → |
| Nashua | City | Chickasaw / Floyd | 1,520 | 1,624 | 1,663 | → |
| Nemaha | City | Sac | ... | 94 | 85 | → |
| Neola | City | Pottawattamie | 913 | 852 | 842 | → |
| Nevada | City | Story | 6,045 | 6,663 | 6,798 | → |
| New Albin | City | Allamakee | ... | 546 | 522 | → |
| New Hampton | City | Chickasaw | 3,820 | 3,706 | 3,571 | → |
| New Hartford | City | Butler | 694 | 659 | 516 | → |
| New Haven | Census-Designated Place | Mitchell | ... | ... | 91 | → |
| New Liberty | City | Scott | ... | 126 | 137 | → |
| New London | City | Henry | 2,005 | 1,960 | 1,897 | → |
| New Market | City | Taylor | 454 | 456 | 415 | → |
| New Providence | City | Hardin | 247 | 229 | 228 | → |
| New Sharon | City | Mahaska | 1,145 | 1,338 | 1,293 | → |
| New Vienna | City | Dubuque | 376 | 394 | 407 | → |
| New Virginia | City | Warren | 434 | 470 | 489 | → |
| Newell | City | Buena Vista | 947 | 885 | 876 | → |
| Newhall | City | Benton | 969 | 886 | 875 | → |
| Newton | City | Jasper | 14,870 | 15,589 | 15,254 | → |
| Nichols | City | Muscatine | ... | 389 | 374 | → |
| Nodaway | City | Adams | 147 | 131 | 114 | → |
| Nora Springs | City | Floyd / Cerro Gordo | 1,514 | 1,527 | 1,431 | → |
| North Buena Vista | City | Clayton | ... | 120 | 121 | → |
| North English | City | Keokuk / Iowa | 955 | 989 | 1,041 | → |
| North Liberty | City | Johnson | 3,063 | 5,350 | 13,374 | → |
| North Washington | City | Chickasaw | 98 | 118 | 117 | → |
| Northboro | City | Page | ... | 58 | 58 | → |
| Northwood | City | Worth | 1,960 | 2,055 | 1,989 | → |
| Norwalk | City | Warren / Polk | 5,757 | 6,998 | 8,945 | → |
| Norway | City | Benton | 568 | 612 | 545 | → |
| Numa | City | Appanoose | 150 | 104 | 92 | → |
| Oakland | City | Pottawattamie | 1,521 | 1,487 | 1,527 | → |
| Oakland Acres | City | Jasper | 152 | 166 | 156 | → |
| Oakville | City | Louisa | 439 | 438 | 173 | → |
| Ocheyedan | City | Osceola | 531 | 536 | 490 | → |
| Odebolt | City | Sac | 1,159 | 1,156 | 1,013 | → |
| Oelwein | City | Fayette | 6,928 | 6,693 | 6,415 | → |
| Ogden | City | Boone | 1,913 | 2,023 | 2,044 | → |
| Okoboji | City | Dickinson | ... | 849 | 807 | → |
| Olds | City | Henry | 196 | 246 | 229 | → |
| Olin | City | Jones | 663 | 723 | 698 | → |
| Ollie | City | Keokuk | 205 | 224 | 215 | → |
| Onawa | City | Monona | 2,950 | 3,105 | 2,998 | → |
| Onslow | City | Jones | 216 | 225 | 197 | → |
| Orange City | City | Sioux | 5,065 | 5,631 | 6,004 | → |
| Orchard | City | Mitchell | 93 | 86 | 71 | → |
| Orient | City | Adair | 352 | 393 | 408 | → |
| Orleans | City | Dickinson | ... | 626 | 608 | → |
| Osage | City | Mitchell | 3,446 | 3,477 | 3,619 | → |
| Osceola | City | Clarke | 4,202 | 4,749 | 4,929 | → |
| Oskaloosa | City | Mahaska | 10,730 | 11,080 | 11,463 | → |
| Ossian | City | Winneshiek | 826 | 856 | 845 | → |
| Osterdock | City | Clayton | 49 | 54 | 59 | → |
| Otho | City | Webster | ... | 590 | 542 | → |
| Oto | City | Woodbury | 137 | 146 | 108 | → |
| Otranto | Census-Designated Place | Mitchell | ... | ... | 27 | → |
| Ottosen | City | Humboldt | 72 | 61 | 55 | → |
| Ottumwa | City | Wapello | 24,603 | 24,867 | 25,023 | → |
| Owasa | City | Hardin | 37 | 38 | 43 | → |
| Oxford | City | Johnson | 670 | 718 | 807 | → |
| Oxford Junction | City | Jones | 581 | 574 | 496 | → |
| Oyens | City | Plymouth | 113 | 129 | 103 | → |
| Pacific Junction | City | Mills | 542 | 504 | 471 | → |
| Packwood | City | Jefferson | 195 | 223 | 204 | → |
| Palmer | City | Pocahontas | 230 | 206 | 165 | → |
| Palo | City | Linn | 518 | 621 | 1,026 | → |
| Panama | City | Shelby | 201 | 208 | 221 | → |
| Panora | City | Guthrie | 1,112 | 1,176 | 1,124 | → |
| Panorama Park | City | Scott | ... | 123 | 129 | → |
| Park View | Census-Designated Place | Scott | 2,192 | 2,169 | 2,389 | → |
| Parkersburg | City | Butler | 1,810 | 1,895 | 1,870 | → |
| Parnell | City | Iowa | 209 | 218 | 193 | → |
| Paton | City | Greene | 255 | 260 | 236 | → |
| Patterson | City | Madison | ... | 118 | 130 | → |
| Paullina | City | O'Brien | 1,162 | 1,092 | 1,056 | → |
| Pella | City | Marion | 9,347 | 9,914 | 10,352 | → |
| Peosta | City | Dubuque | 136 | 651 | 1,377 | → |
| Percival | Census-Designated Place | Fremont | ... | ... | 87 | → |
| Perry | City | Dallas | 6,675 | 7,629 | 7,702 | → |
| Persia | City | Harrison | 311 | 359 | 319 | → |
| Peterson | City | Clay | 399 | 363 | 334 | → |
| Pierson | City | Woodbury | 306 | 373 | 366 | → |
| Pilot Mound | City | Boone | 199 | 218 | 173 | → |
| Pioneer | City | Humboldt | 46 | 21 | 23 | → |
| Pisgah | City | Harrison | 260 | 314 | 251 | → |
| Plainfield | City | Bremer | 453 | 438 | 436 | → |
| Plano | City | Appanoose | 75 | 58 | 70 | → |
| Pleasant Hill | City | Polk | 3,817 | 5,088 | 8,785 | → |
| Pleasant Plain | City | Jefferson | 128 | 127 | 93 | → |
| Pleasanton | City | Decatur | ... | 41 | 49 | → |
| Pleasantville | City | Marion | 1,483 | 1,547 | 1,694 | → |
| Plover | City | Pocahontas | 104 | 95 | 77 | → |
| Plymouth | City | Cerro Gordo | 445 | 429 | 382 | → |
| Pocahontas | City | Pocahontas | 2,151 | 1,981 | 1,789 | → |
| Polk City | City | Polk | 1,878 | 2,374 | 3,418 | → |
| Pomeroy | City | Calhoun | 767 | 709 | 662 | → |
| Popejoy | City | Franklin | 92 | 78 | 79 | → |
| Portland | Census-Designated Place | Cerro Gordo | ... | ... | 35 | → |
| Portsmouth | City | Shelby | 209 | 230 | 195 | → |
| Postville | City | Clayton / Allamakee | 1,473 | 2,260 | 2,227 | → |
| Prairie City | City | Jasper | 1,383 | 1,371 | 1,680 | → |
| Prairieburg | City | Linn | 203 | 175 | 178 | → |
| Prescott | City | Adams | 284 | 268 | 257 | → |
| Preston | City | Jackson | 1,049 | 948 | 1,012 | → |
| Primghar | City | O'Brien | 969 | 891 | 909 | → |
| Princeton | City | Scott | 891 | 932 | 886 | → |
| Promise City | City | Wayne | ... | 101 | 111 | → |
| Protivin | City | Howard / Chickasaw | 310 | 312 | 283 | → |
| Pulaski | City | Davis | 258 | 242 | 260 | → |
| Quasqueton | City | Buchanan | 585 | 582 | 554 | → |
| Quimby | City | Cherokee | 339 | 373 | 319 | → |
| Radcliffe | City | Hardin | 574 | 607 | 545 | → |
| Rake | City | Winnebago | ... | 208 | 225 | → |
| Ralston | City | Greene / Carroll | 128 | 93 | 79 | → |
| Randalia | City | Fayette | 88 | 86 | 68 | → |
| Randall | City | Hamilton | ... | 154 | 173 | → |
| Randolph | City | Fremont | 226 | 207 | 168 | → |
| Rathbun | City | Appanoose | 89 | 88 | 89 | → |
| Raymond | City | Black Hawk | 614 | 540 | 788 | → |
| Readlyn | City | Bremer | 773 | 783 | 808 | → |
| Reasnor | City | Jasper | ... | 205 | 152 | → |
| Red Oak | City | Montgomery | 6,278 | 6,208 | 5,742 | → |
| Redding | City | Ringgold | 119 | 78 | 82 | → |
| Redfield | City | Dallas | 883 | 828 | 835 | → |
| Reinbeck | City | Grundy | 1,635 | 1,754 | 1,664 | → |
| Rembrandt | City | Buena Vista | 210 | 230 | 203 | → |
| Remsen | City | Plymouth | 1,527 | 1,770 | 1,663 | → |
| Renwick | City | Humboldt | 287 | 303 | 242 | → |
| Rhodes | City | Marshall | ... | 306 | 305 | → |
| Riceville | City | Howard / Mitchell | 812 | 838 | 785 | → |
| Richland | City | Keokuk | 522 | 578 | 584 | → |
| Rickardsville | City | Dubuque | 155 | 189 | 182 | → |
| Ricketts | City | Crawford | 122 | 144 | 145 | → |
| Ridgeway | City | Winneshiek | 288 | 291 | 315 | → |
| Rinard | City | Calhoun | 71 | 73 | 52 | → |
| Ringsted | City | Emmet | 500 | 435 | 422 | → |
| Rippey | City | Greene | 275 | 319 | 292 | → |
| River Sioux | Census-Designated Place | Harrison | ... | ... | 59 | → |
| Riverdale | City | Scott | 788 | 613 | 405 | → |
| Riverside | City | Washington | 831 | 941 | 993 | → |
| Riverton | City | Fremont | 324 | 304 | 304 | → |
| Robins | City | Linn | 955 | 1,834 | 3,142 | → |
| Rochester | Census-Designated Place | Cedar | ... | ... | 133 | → |
| Rock Falls | City | Cerro Gordo | 131 | 169 | 155 | → |
| Rock Rapids | City | Lyon | 2,723 | 2,574 | 2,549 | → |
| Rock Valley | City | Sioux | ... | 2,906 | 3,354 | → |
| Rockford | City | Floyd | 892 | 909 | 860 | → |
| Rockwell | City | Cerro Gordo | 801 | 989 | 1,039 | → |
| Rockwell City | City | Calhoun | 1,994 | 2,225 | 1,709 | → |
| Rodman | City | Palo Alto | 56 | 56 | 45 | → |
| Rodney | City | Monona | 71 | 67 | 60 | → |
| Roland | City | Story | 1,042 | 1,322 | 1,284 | → |
| Rolfe | City | Pocahontas | 752 | 677 | 584 | → |
| Rome | City | Henry | 168 | 115 | 117 | → |
| Rose Hill | City | Mahaska | 156 | 207 | 168 | → |
| Roseville | Census-Designated Place | Floyd | ... | ... | 49 | → |
| Rossie | City | Clay | 94 | 59 | 70 | → |
| Rowan | City | Wright | ... | 200 | 158 | → |
| Rowley | City | Buchanan | 272 | 290 | 264 | → |
| Royal | City | Clay | 442 | 482 | 446 | → |
| Rudd | City | Floyd | 433 | 434 | 369 | → |
| Runnells | City | Polk | 306 | 364 | 507 | → |
| Russell | City | Lucas | 531 | 559 | 554 | → |
| Ruthven | City | Palo Alto | ... | 715 | 737 | → |
| Rutland | City | Humboldt | 216 | 143 | 126 | → |
| Ryan | City | Delaware | 386 | 405 | 361 | → |
| Sabula | City | Jackson | 714 | 673 | 576 | → |
| Sac City | City | Sac | 2,528 | 2,368 | 2,220 | → |
| Sageville | City | Dubuque | ... | 262 | 122 | → |
| Salem | City | Henry | 463 | 439 | 383 | → |
| Salix | City | Woodbury | ... | 401 | 363 | → |
| Sanborn | City | O'Brien | 1,347 | 1,349 | 1,404 | → |
| Sandyville | City | Warren | 60 | 61 | 51 | → |
| Saylorville | Census-Designated Place | Polk | ... | ... | 3,301 | → |
| Scarville | City | Winnebago | 92 | 97 | 72 | → |
| Schaller | City | Sac | 768 | 779 | 772 | → |
| Schleswig | City | Crawford | 927 | 834 | 882 | → |
| Scranton | City | Greene | 601 | 604 | 557 | → |
| Searsboro | City | Poweshiek | 164 | 159 | 148 | → |
| Sergeant Bluff | City | Woodbury | 2,866 | 3,392 | 4,227 | → |
| Sexton | Census-Designated Place | Kossuth | ... | ... | 37 | → |
| Seymour | City | Wayne | 869 | 813 | 701 | → |
| Shambaugh | City | Page | 207 | 189 | 191 | → |
| Shannon City | City | Union / Ringgold | ... | 79 | 71 | → |
| Sharpsburg | City | Taylor | 116 | 98 | 89 | → |
| Sheffield | City | Franklin | 1,173 | 928 | 1,172 | → |
| Shelby | City | Shelby / Pottawattamie | 637 | 696 | 641 | → |
| Sheldahl | City | Story / Polk / Boone | 315 | 329 | 319 | → |
| Sheldon | City | O'Brien / Sioux | 4,976 | 5,019 | 5,188 | → |
| Shell Rock | City | Butler | 1,398 | 1,287 | 1,296 | → |
| Shellsburg | City | Benton | 774 | 938 | 983 | → |
| Shenandoah | City | Page / Fremont | 5,615 | 5,554 | 5,150 | → |
| Sherrill | City | Dubuque | ... | 200 | 177 | → |
| Shueyville | City | Johnson | ... | 326 | 577 | → |
| Sibley | City | Osceola | 2,808 | 2,796 | 2,798 | → |
| Sidney | City | Fremont | 1,242 | 1,298 | 1,138 | → |
| Sigourney | City | Keokuk | 2,150 | 2,203 | 2,059 | → |
| Silver City | City | Mills | 252 | 259 | 245 | → |
| Sioux Center | City | Sioux | 5,017 | 6,059 | 7,048 | → |
| Sioux City | City | Woodbury | 80,682 | 85,096 | 82,684 | → |
| Sioux Rapids | City | Buena Vista | ... | 746 | 775 | → |
| Slater | City | Story | 1,268 | 1,308 | 1,489 | → |
| Sloan | City | Woodbury | 927 | 1,045 | 973 | → |
| Smithland | City | Woodbury | 287 | 226 | 224 | → |
| Soldier | City | Monona | 205 | 193 | 174 | → |
| Solon | City | Johnson | 1,062 | 1,231 | 2,037 | → |
| Somers | City | Calhoun | 183 | 165 | 113 | → |
| South Amana | Census-Designated Place | Iowa | ... | ... | 159 | → |
| South English | City | Keokuk | 237 | 209 | 212 | → |
| Spencer | City | Clay | 11,210 | 11,334 | 11,233 | → |
| Spillville | City | Winneshiek | 395 | 374 | 367 | → |
| Spirit Lake | City | Dickinson | 3,888 | 4,296 | 4,840 | → |
| Spragueville | City | Jackson | 118 | 85 | 81 | → |
| Spring Hill | City | Warren | 86 | 92 | 63 | → |
| Springbrook | City | Jackson | 165 | 180 | 144 | → |
| Springville | City | Linn | 1,066 | 1,097 | 1,074 | → |
| St. Ansgar | City | Mitchell | 1,173 | 1,026 | 1,107 | → |
| St. Anthony | City | Marshall | 115 | 111 | 102 | → |
| St. Benedict | Census-Designated Place | Kossuth | ... | ... | 39 | → |
| St. Charles | City | Madison | 537 | 619 | 653 | → |
| St. Donatus | City | Jackson | ... | 145 | 135 | → |
| St. Joseph | Census-Designated Place | Kossuth | ... | ... | 61 | → |
| St. Lucas | City | Fayette | 164 | 180 | 143 | → |
| St. Marys | City | Warren | 111 | 134 | 127 | → |
| St. Olaf | City | Clayton | 125 | 132 | 108 | → |
| St. Paul | City | Lee | 120 | 118 | 129 | → |
| Stacyville | City | Mitchell | 469 | 470 | 494 | → |
| Stanhope | City | Hamilton | 450 | 488 | 422 | → |
| Stanley | City | Fayette / Buchanan | 118 | 130 | 125 | → |
| Stanton | City | Montgomery | 697 | 714 | 689 | → |
| Stanwood | City | Cedar | 647 | 680 | 684 | → |
| State Center | City | Marshall | 1,248 | 1,350 | 1,468 | → |
| Steamboat Rock | City | Hardin | 335 | 329 | 310 | → |
| Stockport | City | Van Buren | 260 | 284 | 296 | → |
| Stockton | City | Muscatine | 187 | 183 | 197 | → |
| Stone City | Census-Designated Place | Jones | ... | ... | 192 | → |
| Storm Lake | City | Buena Vista | 8,953 | 10,113 | 10,600 | → |
| Story City | City | Story | 2,970 | 3,238 | 3,431 | → |
| Stout | City | Grundy | 192 | 218 | 224 | → |
| Stratford | City | Hamilton / Webster | 733 | 745 | 743 | → |
| Strawberry Point | City | Clayton | 1,367 | 1,380 | 1,279 | → |
| Struble | City | Plymouth | ... | 81 | 78 | → |
| Stuart | City | Guthrie / Adair | 1,529 | 1,724 | 1,648 | → |
| Sully | City | Jasper | 861 | 927 | 821 | → |
| Sumner | City | Bremer / Fayette | 2,109 | 2,102 | 2,028 | → |
| Sun Valley Lake | Census-Designated Place | Ringgold | ... | ... | 161 | → |
| Superior | City | Dickinson | 131 | 140 | 130 | → |
| Sutherland | City | O'Brien | 714 | 707 | 649 | → |
| Swaledale | City | Cerro Gordo | 457 | 168 | 165 | → |
| Swan | City | Marion | 70 | 121 | 72 | → |
| Swea City | City | Kossuth | 633 | 642 | 536 | → |
| Swisher | City | Johnson | 634 | 821 | 879 | → |
| Tabor | City | Mills / Fremont | 958 | 1,018 | 1,040 | → |
| Tama | City | Tama | 2,715 | 2,736 | 2,877 | → |
| Templeton | City | Carroll | 319 | 322 | 362 | → |
| Tennant | City | Shelby | ... | 79 | 68 | → |
| Terril | City | Dickinson | 383 | 404 | 367 | → |
| Thayer | City | Union | 79 | 64 | 59 | → |
| Thompson | City | Winnebago | 516 | 598 | 502 | → |
| Thor | City | Humboldt | 214 | 174 | 186 | → |
| Thornburg | City | Keokuk | 91 | 84 | 67 | → |
| Thornton | City | Cerro Gordo | 384 | 422 | 422 | → |
| Thurman | City | Fremont | 235 | 238 | 229 | → |
| Tiffin | City | Johnson | ... | 1,026 | 1,947 | → |
| Tingley | City | Ringgold | 179 | 171 | 184 | → |
| Tipton | City | Cedar | 3,037 | 3,160 | 3,221 | → |
| Titonka | City | Kossuth | 618 | 581 | 476 | → |
| Toeterville | Census-Designated Place | Mitchell | ... | ... | 48 | → |
| Toledo | City | Tama | 2,393 | 2,566 | 2,341 | → |
| Toronto | City | Clinton | 135 | 134 | 124 | → |
| Traer | City | Tama | 1,556 | 1,594 | 1,703 | → |
| Treynor | City | Pottawattamie | 956 | 937 | 919 | → |
| Tripoli | City | Bremer | 1,111 | 1,313 | 1,313 | → |
| Truesdale | City | Buena Vista | 151 | 91 | 81 | → |
| Truro | City | Madison | 392 | 427 | 485 | → |
| Turin | City | Monona | ... | 87 | 68 | → |
| Twin Lakes | Census-Designated Place | Calhoun | ... | ... | 334 | → |
| Udell | City | Appanoose | 76 | 58 | 47 | → |
| Underwood | City | Pottawattamie | 515 | 695 | 917 | → |
| Union | City | Hardin | 448 | 427 | 397 | → |
| Unionville | City | Appanoose | 133 | 131 | 102 | → |
| University Heights | City | Johnson | 1,036 | 976 | 1,051 | → |
| University Park | City | Mahaska | 595 | 540 | 487 | → |
| Urbana | City | Benton | 635 | 1,033 | 1,458 | → |
| Urbandale | City | Polk / Dallas | 23,515 | 29,195 | 39,463 | → |
| Ute | City | Monona | ... | 394 | 374 | → |
| Vail | City | Crawford | 432 | 451 | 436 | → |
| Valeria | City | Jasper | 69 | 64 | 57 | → |
| Van Horne | City | Benton | 683 | 708 | 682 | → |
| Van Meter | City | Dallas | ... | 946 | 1,016 | → |
| Van Wert | City | Decatur | 249 | 225 | 230 | → |
| Varina | City | Pocahontas | 102 | 90 | 71 | → |
| Ventura | City | Cerro Gordo | 639 | 669 | 717 | → |
| Victor | City | Iowa / Poweshiek | 972 | 949 | 893 | → |
| Villisca | City | Montgomery | 1,354 | 1,350 | 1,252 | → |
| Vincent | City | Webster | 185 | 158 | 174 | → |
| Vining | City | Tama | 78 | 70 | 50 | → |
| Vinton | City | Benton | 5,121 | 5,131 | 5,257 | → |
| Volga | City | Clayton | 318 | 249 | 208 | → |
| Wadena | City | Fayette | 236 | 243 | 262 | → |
| Wahpeton | City | Dickinson | 482 | 457 | 341 | → |
| Walcott | City | Muscatine / Scott | 1,345 | 1,524 | 1,629 | → |
| Walford | City | Benton / Linn | 248 | 1,218 | 1,463 | → |
| Walker | City | Linn | 669 | 755 | 791 | → |
| Wall Lake | City | Sac | 875 | 848 | 819 | → |
| Wallingford | City | Emmet | 205 | 212 | 197 | → |
| Walnut | City | Pottawattamie | ... | 886 | 785 | → |
| Wapello | City | Louisa | 2,041 | 2,140 | 2,067 | → |
| Washburn | Census-Designated Place | Black Hawk | ... | ... | 876 | → |
| Washington | City | Washington | 7,158 | 7,087 | 7,266 | → |
| Washta | City | Cherokee | 279 | 279 | 248 | → |
| Waterloo | City | Black Hawk | 66,732 | 68,750 | 68,406 | → |
| Waterville | City | Allamakee | 172 | 141 | 144 | → |
| Watkins | Census-Designated Place | Benton | ... | ... | 118 | → |
| Waucoma | City | Fayette | 386 | 297 | 257 | → |
| Waukee | City | Dallas | ... | 5,447 | 13,790 | → |
| Waukon | City | Allamakee | 4,516 | 4,127 | 3,897 | → |
| Waverly | City | Bremer | 8,718 | 8,969 | 9,874 | → |
| Wayland | City | Henry | 819 | 959 | 966 | → |
| Webb | City | Clay | 165 | 165 | 141 | → |
| Webster | City | Keokuk | 103 | 111 | 88 | → |
| Webster City | City | Hamilton | 7,969 | 8,194 | 8,070 | → |
| Weldon | City | Decatur | 151 | 143 | 125 | → |
| Wellman | City | Washington | 1,132 | 1,414 | 1,408 | → |
| Wellsburg | City | Grundy | 682 | 718 | 707 | → |
| Welton | City | Clinton | 184 | 167 | 165 | → |
| Wesley | City | Kossuth | 461 | 469 | 390 | → |
| West Amana | Census-Designated Place | Iowa | ... | ... | 135 | → |
| West Bend | City | Kossuth / Palo Alto | 951 | 828 | 785 | → |
| West Branch | City | Johnson / Cedar | 1,936 | 2,201 | 2,322 | → |
| West Burlington | City | Des Moines | 3,077 | 3,159 | 2,968 | → |
| West Chester | City | Washington | 178 | 162 | 146 | → |
| West Des Moines | City | Polk / Warren / Dallas | 32,193 | 47,154 | 56,609 | → |
| West Liberty | City | Muscatine | 2,954 | 3,348 | 3,736 | → |
| West Okoboji | City | Dickinson | ... | 333 | 289 | → |
| West Point | City | Lee | 1,147 | 983 | 966 | → |
| West Union | City | Fayette | 2,509 | 2,549 | 2,486 | → |
| Westfield | City | Plymouth | 160 | 192 | 132 | → |
| Westgate | City | Fayette | 209 | 229 | 211 | → |
| Weston | Census-Designated Place | Pottawattamie | ... | ... | 92 | → |
| Westphalia | City | Shelby | 140 | 160 | 127 | → |
| Westside | City | Crawford | 380 | 327 | 299 | → |
| Westwood | City | Henry | 82 | 127 | 112 | → |
| What Cheer | City | Keokuk | 762 | 679 | 646 | → |
| Wheatland | City | Clinton | 727 | 771 | 764 | → |
| Whiting | City | Monona | ... | 801 | 762 | → |
| Whittemore | City | Kossuth | 548 | 529 | 504 | → |
| Whitten | City | Hardin | 137 | 159 | 149 | → |
| Willey | City | Carroll | 78 | 105 | 88 | → |
| Williams | City | Hamilton | 358 | 427 | 344 | → |
| Williamsburg | City | Iowa | 2,195 | 2,654 | 3,068 | → |
| Williamson | City | Lucas | 166 | 162 | 152 | → |
| Wilton | City | Muscatine / Cedar | 2,567 | 2,798 | 2,802 | → |
| Windsor Heights | City | Polk | 5,144 | 4,791 | 4,860 | → |
| Winfield | City | Henry | 1,051 | 1,132 | 1,134 | → |
| Winterset | City | Madison | 4,463 | 4,782 | 5,190 | → |
| Winthrop | City | Buchanan | 754 | 776 | 850 | → |
| Wiota | City | Cass | 160 | 149 | 116 | → |
| Woden | City | Hancock | 305 | 241 | 229 | → |
| Woodbine | City | Harrison | 1,613 | 1,553 | 1,459 | → |
| Woodburn | City | Clarke | 240 | 243 | 202 | → |
| Woodward | City | Dallas | 1,192 | 1,203 | 1,024 | → |
| Woolstock | City | Wright | 212 | 204 | 168 | → |
| Worthington | City | Dubuque | ... | 368 | 401 | → |
| Wyoming | City | Jones | 657 | 628 | 515 | → |
| Yale | City | Guthrie | 220 | 287 | 246 | → |
| Yetter | City | Calhoun | 49 | 36 | 34 | → |
| Yorktown | City | Page | 92 | 83 | 85 | → |
| Zearing | City | Story | 614 | 619 | 554 | → |
| Zwingle | City | Dubuque / Jackson | 83 | 99 | 91 | → |
Source: U.S. Census Bureau (web).
Explanation: 2000 and 2010 population of incorporated places in the boundaries of 2010.