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Illinois

Illinois is a thriving state with so much to offer! Below is an interactive map of the state added with a complete list of counties. Illinois has an estimated population of more than 12,800,000, more than 5,350,000 housing units and an average median household income of $61,229.

State slogan: Land of Lincoln

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Map of Illinois

Counties in Illinois

CountySeatEst.Population
Cook CountyChicago18315,194,675
DuPage CountyWheaton1839916,924
Lake CountyWaukegan1839703,462
Will CountyJoliet1836677,560
Kane CountyGeneva1836515,269
McHenry CountyWoodstock1836308,760
Winnebago CountyRockford1836295,266
St. Clair CountyBelleville1790270,056
Madison CountyEdwardsville1812269,282
Champaign CountyUrbana1833201,081
Sangamon CountySpringfield1821197,465
Peoria CountyPeoria1825186,494
McLean CountyBloomington1830169,572
Rock Island CountyRock Island1831147,546
Tazewell CountyPekin1827135,394
Kendall CountyYorkville1841114,736
LaSalle CountyOttawa1831113,924
Kankakee CountyKankakee1853113,449
Macon CountyDecatur1829110,768
DeKalb CountySycamore1837105,160
Vermilion CountyDanville182681,625
Adams CountyQuincy182567,103
Williamson CountyMarion183966,357
Jackson CountyMurphysboro181660,218
Whiteside CountyMorrison183658,498
Boone CountyBelvidere183754,165
Coles CountyCharleston183053,873
Ogle CountyOregon183653,497
Knox CountyGalesburg182552,919
Henry CountyCambridge182550,486
Grundy CountyMorris184150,063
Macoupin CountyCarlinville182947,765
Stephenson CountyFreeport183747,711
Franklin CountyBenton181839,561
Marion CountySalem182339,437
Livingston CountyPontiac183738,950
Jefferson CountyMount Vernon181938,827
Woodford CountyEureka184138,664
Clinton CountyCarlyle182437,762
Fulton CountyLewistown182337,069
Lee CountyDixon183936,031
Morgan CountyJacksonville182335,547
Bureau CountyPrinceton183734,978
Christian CountyTaylorville183934,800
Effingham CountyEffingham183134,242
Randolph CountyChester179533,476
Monroe CountyWaterloo181632,957
McDonough CountyMacomb182632,612
Logan CountyLincoln183930,305
Montgomery CountyHillsboro182130,104
Iroquois CountyWatseka183329,718
Saline CountyHarrisburg184724,913
Jersey CountyJerseyville183922,985
Jo Daviess CountyGalena182722,678
Shelby CountyShelbyville182722,363
Perry CountyPinckneyville182722,350
Fayette CountyVandalia182122,140
Douglas CountyTuscola185919,980
Crawford CountyRobinson181619,817
Hancock CountyCarthage182519,104
Edgar CountyParis182318,576
Union CountyJonesboro181817,808
Bond CountyGreenville181717,768
Warren CountyMonmouth182517,707
Lawrence CountyLawrenceville182116,833
Wayne CountyFairfield181916,760
Piatt CountyMonticello184116,729
DeWitt CountyClinton183916,561
Mercer CountyAledo182516,434
Pike CountyPittsfield182116,430
Clark CountyMarshall181916,335
Richland CountyOlney184116,233
Massac CountyMetropolis184315,429
Carroll CountyMount Carroll183915,387
Moultrie CountySullivan184314,846
Washington CountyNashville181814,716
Mason CountyHavana184114,666
White CountyCarmi181514,665
Ford CountyPaxton185914,081
Greene CountyCarrollton182113,886
Clay CountyLouisville182413,815
Cass CountyVirginia183713,642
Menard CountyPetersburg183912,705
Marshall CountyLacon183912,640
Johnson CountyVienna181212,582
Wabash CountyMount Carmel182411,947
Cumberland CountyToledo184311,048
Jasper CountyNewton18319,698
Hamilton CountyMcLeansboro18218,457
Alexander CountyCairo18198,238
Schuyler CountyRushville18257,544
Henderson CountyOquawka18417,331
Brown CountyMount Sterling18396,937
Edwards CountyAlbion18146,721
Pulaski CountyMound City18436,161
Putnam CountyHennepin18256,006
Stark CountyToulon18395,994
Gallatin CountyShawneetown18125,589
Scott CountyWinchester18395,355
Calhoun CountyHardin18255,089
Pope CountyGolconda18164,470
Hardin CountyElizabethtown18394,320