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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, urbanization, »race«, ethnicity).

NameStatusPopulation
Census
1990-04-01
Population
Census
2000-04-01
Population
Census
2010-04-01
Population
Census
2020-04-01
Population
Estimate
2023-07-01
IllinoisState11,430,60212,419,29312,830,63212,813,46912,549,689
AdamsCounty66,09068,27767,10365,72964,441
AlexanderCounty10,6269,5908,2385,2394,695
BondCounty14,99117,63317,76816,72516,450
BooneCounty30,80641,78654,16553,45153,202
BrownCounty5,8366,9506,9376,2406,294
BureauCounty35,68835,50334,97833,24332,729
CalhounCounty5,3225,0845,0894,4384,317
CarrollCounty16,80516,67415,38715,70715,526
CassCounty13,43713,69513,64213,04912,596
ChampaignCounty173,025179,669201,081205,873205,644
ChristianCounty34,41835,37234,80034,03933,228
ClarkCounty15,92117,00816,33515,46315,088
ClayCounty14,46014,56013,81513,28912,999
ClintonCounty33,94435,53537,76236,89336,785
ColesCounty51,64453,19653,87346,86446,060
CookCounty5,105,0675,376,7415,194,6755,275,5555,087,072
CrawfordCounty19,46420,45219,81718,67418,300
CumberlandCounty10,67011,25311,04810,45310,261
DeKalbCounty77,93288,969105,160100,422100,288
De Witt (DeWitt)County16,51616,79816,56115,52015,365
DouglasCounty19,46419,92219,98019,73619,629
DuPageCounty781,666904,161916,924932,884921,213
EdgarCounty19,59519,70418,57616,85616,334
EdwardsCounty7,4406,9716,7216,2455,968
EffinghamCounty31,70434,26434,24234,67634,331
FayetteCounty20,89321,80222,14021,49821,164
FordCounty14,27514,24114,08113,52613,250
FranklinCounty40,31939,01839,56137,80337,138
FultonCounty38,08038,25037,06933,60832,541
GallatinCounty6,9096,4455,5894,9444,670
GreeneCounty15,31714,76113,88611,98711,543
GrundyCounty32,33737,53550,06352,53953,578
HamiltonCounty8,4998,6218,4577,9967,911
HancockCounty21,37320,12119,10417,61317,186
HardinCounty5,1894,8004,3203,6473,569
HendersonCounty8,0968,2137,3316,3856,088
HenryCounty51,15951,02050,48649,28248,448
IroquoisCounty30,78731,33429,71827,08226,136
JacksonCounty61,06759,61260,21852,96652,141
JasperCounty10,60910,1179,6989,2879,144
JeffersonCounty37,02040,04538,82737,11036,320
JerseyCounty20,53921,66822,98521,51821,091
Jo DaviessCounty21,82122,28922,67822,04321,756
JohnsonCounty11,34712,87812,58213,30413,326
KaneCounty317,471404,119515,269516,516514,982
KankakeeCounty96,255103,833113,449107,510105,940
KendallCounty39,41354,544114,736131,868139,976
KnoxCounty56,39355,83652,91949,95848,411
LakeCounty516,418644,356703,462714,336708,760
La SalleCounty106,913111,509113,924109,650108,309
LawrenceCounty15,97215,45216,83315,29214,813
LeeCounty34,39236,06236,03134,15133,654
LivingstonCounty39,30139,67838,95035,82735,320
LoganCounty30,79831,18330,30527,99527,590
MaconCounty117,206114,706110,768103,984100,591
MacoupinCounty47,67949,01947,76544,97344,018
MadisonCounty249,238258,941269,282265,868262,752
MarionCounty41,56141,69139,43737,73636,673
MarshallCounty12,84613,18012,64011,75211,683
MasonCounty16,26916,03814,66613,09112,523
MassacCounty14,75215,16115,42914,17013,661
McDonoughCounty35,24432,91332,61227,23226,839
McHenryCounty183,241260,077308,760310,213312,800
McLeanCounty129,180150,433169,572170,956170,441
MenardCounty11,16412,48612,70512,29511,954
MercerCounty17,29016,95716,43415,69815,487
MonroeCounty22,42227,61932,95734,95334,957
MontgomeryCounty30,72830,65230,10428,28327,663
MorganCounty36,39736,61635,54732,92032,140
MoultrieCounty13,93014,28714,84614,52714,342
OgleCounty45,95751,03253,49751,78051,265
PeoriaCounty182,827183,433186,494181,836177,513
PerryCounty21,41223,09422,35020,94120,503
PiattCounty15,54816,36516,72916,67616,714
PikeCounty17,57717,38416,43014,73414,342
PopeCounty4,3734,4134,4703,7643,707
PulaskiCounty7,5237,3486,1615,1904,911
PutnamCounty5,7306,0866,0065,6365,561
RandolphCounty34,58333,89333,47630,16429,815
RichlandCounty16,54516,14916,23315,81115,488
Rock IslandCounty148,723149,374147,546144,667141,236
SalineCounty26,55126,73324,91323,77222,873
SangamonCounty178,386188,951197,465196,341193,491
SchuylerCounty7,4987,1897,5446,8996,733
ScottCounty5,6445,5375,3554,9474,710
ShelbyCounty22,26122,89322,36320,99020,568
StarkCounty6,5346,3325,9945,3955,218
St. ClairCounty262,852256,082270,056257,412251,018
StephensonCounty48,05248,97947,71144,63143,105
TazewellCounty123,692128,485135,394131,341129,541
UnionCounty17,61918,29317,80817,23916,667
VermilionCounty88,25783,91981,62574,20471,652
WabashCounty13,11112,93711,94711,36210,942
WarrenCounty19,18118,73517,70716,83316,185
WashingtonCounty14,96515,14814,71613,75813,536
WayneCounty17,24117,15116,76016,17315,761
WhiteCounty16,52215,37114,66513,87213,401
WhitesideCounty60,18660,65358,49855,69454,498
WillCounty357,313502,266677,560697,298700,728
WilliamsonCounty57,73361,29666,35767,15266,706
WinnebagoCounty252,913278,418295,266285,337280,922
WoodfordCounty32,65335,46938,66438,46538,285
USA [United States of America]Federal Republic248,709,873281,421,906308,745,538331,464,948334,914,895

Source: U.S. Census Bureau.

Explanation: Latest available rebased total population figures are tabulated.


Further information about the population structure:

Gender (C 2020)
Males6,283,130
Females6,529,378
Age Groups (C 2020)
0-17 years2,813,039
18-64 years7,905,484
65+ years2,093,985
Age Distribution (C 2020)
80+ years497,525
70-79 years905,185
60-69 years1,521,606
50-59 years1,676,896
40-49 years1,609,617
30-39 years1,729,244
20-29 years1,715,581
10-19 years1,687,567
0-9 years1,469,287
Urbanization (C 2020)
Rural1,674,918
Urban11,137,590
»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