HomeAdministrative Division
Show Map

Illinois

State in USA

Contents: Subdivision

The population development in Illinois as well as related information and services (Wikipedia, Google, images).

The Details icon links to further information about a selected division including its population structure (gender, age groups, age distribution, »race«, ethnicity).

NameStatusPopulation
Census
1990-04-01
Population
Census
2000-04-01
Population
Census
2010-04-01
Population
Census
2020-04-01
IllinoisState11,430,60212,419,29312,830,63212,812,508
AdamsCounty66,09068,27767,10365,737
AlexanderCounty10,6269,5908,2385,240
BondCounty14,99117,63317,76816,725
BooneCounty30,80641,78654,16553,448
BrownCounty5,8366,9506,9376,244
BureauCounty35,68835,50334,97833,244
CalhounCounty5,3225,0845,0894,437
CarrollCounty16,80516,67415,38715,702
CassCounty13,43713,69513,64213,042
ChampaignCounty173,025179,669201,081205,865
ChristianCounty34,41835,37234,80034,032
ClarkCounty15,92117,00816,33515,455
ClayCounty14,46014,56013,81513,288
ClintonCounty33,94435,53537,76236,899
ColesCounty51,64453,19653,87346,863
CookCounty5,105,0675,376,7415,194,6755,275,541
CrawfordCounty19,46420,45219,81718,679
CumberlandCounty10,67011,25311,04810,450
DeKalbCounty77,93288,969105,160100,420
De Witt (DeWitt)County16,51616,79816,56115,516
DouglasCounty19,46419,92219,98019,740
DuPageCounty781,666904,161916,924932,877
EdgarCounty19,59519,70418,57616,866
EdwardsCounty7,4406,9716,7216,245
EffinghamCounty31,70434,26434,24234,668
FayetteCounty20,89321,80222,14021,488
FordCounty14,27514,24114,08113,534
FranklinCounty40,31939,01839,56137,804
FultonCounty38,08038,25037,06933,609
GallatinCounty6,9096,4455,5894,946
GreeneCounty15,31714,76113,88611,985
GrundyCounty32,33737,53550,06352,533
HamiltonCounty8,4998,6218,4577,993
HancockCounty21,37320,12119,10417,620
HardinCounty5,1894,8004,3203,649
HendersonCounty8,0968,2137,3316,387
HenryCounty51,15951,02050,48649,284
IroquoisCounty30,78731,33429,71827,077
JacksonCounty61,06759,61260,21852,974
JasperCounty10,60910,1179,6989,287
JeffersonCounty37,02040,04538,82737,113
JerseyCounty20,53921,66822,98521,512
Jo DaviessCounty21,82122,28922,67822,035
JohnsonCounty11,34712,87812,58213,308
KaneCounty317,471404,119515,269516,522
KankakeeCounty96,255103,833113,449107,502
KendallCounty39,41354,544114,736131,869
KnoxCounty56,39355,83652,91949,967
LakeCounty516,418644,356703,462714,342
La SalleCounty106,913111,509113,924109,658
LawrenceCounty15,97215,45216,83315,280
LeeCounty34,39236,06236,03134,145
LivingstonCounty39,30139,67838,95035,815
LoganCounty30,79831,18330,30527,987
MaconCounty117,206114,706110,768103,998
MacoupinCounty47,67949,01947,76544,967
MadisonCounty249,238258,941269,282265,859
MarionCounty41,56141,69139,43737,729
MarshallCounty12,84613,18012,64011,742
MasonCounty16,26916,03814,66613,086
MassacCounty14,75215,16115,42914,169
McDonoughCounty35,24432,91332,61227,238
McHenryCounty183,241260,077308,760310,229
McLeanCounty129,180150,433169,572170,954
MenardCounty11,16412,48612,70512,297
MercerCounty17,29016,95716,43415,699
MonroeCounty22,42227,61932,95734,962
MontgomeryCounty30,72830,65230,10428,288
MorganCounty36,39736,61635,54732,915
MoultrieCounty13,93014,28714,84614,526
OgleCounty45,95751,03253,49751,788
PeoriaCounty182,827183,433186,494181,830
PerryCounty21,41223,09422,35020,945
PiattCounty15,54816,36516,72916,673
PikeCounty17,57717,38416,43014,739
PopeCounty4,3734,4134,4703,763
PulaskiCounty7,5237,3486,1615,193
PutnamCounty5,7306,0866,0065,637
RandolphCounty34,58333,89333,47630,163
RichlandCounty16,54516,14916,23315,813
Rock IslandCounty148,723149,374147,546144,672
SalineCounty26,55126,73324,91323,768
SangamonCounty178,386188,951197,465196,343
SchuylerCounty7,4987,1897,5446,902
ScottCounty5,6445,5375,3554,949
ShelbyCounty22,26122,89322,36320,990
StarkCounty6,5346,3325,9945,400
St. ClairCounty262,852256,082270,056257,400
StephensonCounty48,05248,97947,71144,630
TazewellCounty123,692128,485135,394131,343
UnionCounty17,61918,29317,80817,244
VermilionCounty88,25783,91981,62574,188
WabashCounty13,11112,93711,94711,361
WarrenCounty19,18118,73517,70716,835
WashingtonCounty14,96515,14814,71613,761
WayneCounty17,24117,15116,76016,179
WhiteCounty16,52215,37114,66513,877
WhitesideCounty60,18660,65358,49855,691
WillCounty357,313502,266677,560696,355
WilliamsonCounty57,73361,29666,35767,153
WinnebagoCounty252,913278,418295,266285,350
WoodfordCounty32,65335,46938,66438,467
USA [United States of America]Federal Republic248,709,873281,421,906308,745,538331,449,281

Source: U.S. Census Bureau (web).

Explanation: All population totals refer to 2020 boundaries.


Further information about the population structure:

Gender (E 2019)
Males6,226,558
Females6,445,263
Age Groups (E 2019)
0-14 years2,322,679
15-64 years8,305,910
65+ years2,043,232
Age Distribution (E 2019)
0-9 years1,516,661
10-19 years1,628,648
20-29 years1,727,207
30-39 years1,710,821
40-49 years1,587,108
50-59 years1,654,462
60-69 years1,465,861
70-79 years872,882
80+ years508,171
»Race« (C 2020)
White7,868,227
Black/African American1,808,271
Indigenous96,498
Asian754,878
Pacific Islander4,501
Some other1,135,149
2 or more1,144,984
Ethnicity (C 2020)
Hispanic or Latino2,337,410
Other10,475,098

See also:


USA: Counties