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Illinois County Map

Below is a visual layout of all counties in the state of Illinois. There are a total of 58 counties in the State of Illinois. It’s noted that most counties in Illinois are named after early American leaders, mainly during the American Revolutionary War.

Interactive IL County Map

county-map-of-illinois

List of Illinois Counties

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