County
· Illinois
Cook County
Cook County is the most populous county in the U.S. state of Illinois and the second-most-populous county in the United States, after Los Angeles County, California. More than 40 percent of all residents of Illinois live within Cook County. As of 2020, the population was 5,275,541. The county seat is Chicago, the most populous city in Illinois and the third most populous city in the United States. The county is at the center of the Chicago metropolitan area.
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Cities and towns 121
- City of Berwyn pop. 55,772
- City of Blue Island pop. 22,005
- City of Burbank pop. 28,789
- City of Calumet City pop. 35,159
- City of Chicago pop. 2,696,555
- City of Chicago Heights pop. 26,905
- City of Country Club Hills pop. 16,407
- City of Countryside pop. 6,275
- City of Des Plaines pop. 59,459
- City of Evanston pop. 77,517
- City of Harvey pop. 19,871
- City of Hickory Hills pop. 14,182
- City of Hometown pop. 4,240
- City of Markham pop. 11,399
- City of Northlake pop. 12,664
- City of Oak Forest pop. 26,793
- City of Palos Heights pop. 11,819
- City of Palos Hills pop. 18,117
- City of Park Ridge pop. 38,810
- City of Prospect Heights pop. 15,691
- City of Rolling Meadows pop. 23,781
- Town of Cicero pop. 83,161
- Village of Alsip pop. 18,601
- Village of Arlington Heights pop. 76,000
- Village of Barrington pop. 10,665
- Village of Barrington Hills pop. 4,060
- Village of Bartlett pop. 40,539
- Village of Bedford Park pop. 589
- Village of Bellwood pop. 18,331
- Village of Berkeley pop. 5,214
- Village of Bridgeview pop. 16,715
- Village of Broadview pop. 7,956
- Village of Brookfield pop. 19,054
- Village of Buffalo Grove pop. 42,794
- Village of Burnham pop. 3,989
- Village of Calumet Park pop. 6,843
- Village of Chicago Ridge pop. 14,130
- Village of Crestwood pop. 10,683
- Village of Dixmoor pop. 2,906
- Village of Dolton pop. 20,941
- Village of East Hazel Crest pop. 1,262
- Village of Elk Grove pop. 32,066
- Village of Elmwood Park pop. 23,945
- Village of Evergreen Park pop. 19,471
- Village of Flossmoor pop. 9,461
- Village of Ford Heights pop. 1,772
- Village of Forest Park pop. 14,012
- Village of Forest View pop. 778
- Village of Franklin Park pop. 18,298
- Village of Glencoe pop. 8,687
Townships 28
- Township of Barrington pop. 16,262
- Township of Berwyn pop. 55,772
- Township of Bloom pop. 84,167
- Township of Bremen pop. 104,849
- Township of Calumet pop. 18,138
- Township of Elk Grove pop. 93,384
- Township of Hanover pop. 97,879
- Township of Lemont pop. 22,436
- Township of Leyden pop. 91,421
- Township of Lyons pop. 112,735
- Township of Maine pop. 137,650
- Township of New Trier pop. 56,180
- Township of Niles pop. 110,131
- Township of Northfield pop. 89,863
- Township of Norwood Park pop. 26,878
- Township of Oak Park pop. 53,224
- Township of Orland pop. 96,470
- Township of Palatine pop. 111,886
- Township of Palos pop. 55,667
- Township of Proviso pop. 148,114
- Township of Rich pop. 74,482
- Township of River Forest pop. 11,597
- Township of Riverside pop. 16,272
- Township of Schaumburg pop. 131,970
- Township of Stickney pop. 40,597
- Township of Thornton pop. 154,231
- Township of Wheeling pop. 154,241
- Township of Worth pop. 149,417
Reference data (Census of Governments 2022)
- Census ID (PID6)
- 102545
- FIPS state
- 17
- FIPS county
- 031
- FIPS place
- 99031
- Census record name
- COUNTY OF COOK
- Mailing address
- 118 N CLARK ST, CHICAGO 60602