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
- Village of Rosemont pop. 3,855
- Village of Sauk Village pop. 9,698
- Village of Schaumburg pop. 77,082
- Village of Schiller Park pop. 11,424
- Village of Skokie pop. 66,422
- Village of South Barrington pop. 5,016
- Village of South Chicago Heights pop. 3,924
- Village of South Holland pop. 21,015
- Village of Stickney pop. 6,963
- Village of Stone Park pop. 4,470
- Village of Streamwood pop. 38,651
- Village of Summit pop. 10,875
- Village of Thornton pop. 2,333
- Village of Tinley Park pop. 54,864
- Village of Westchester pop. 16,492
- Village of Western Springs pop. 13,370
- Village of Wheeling pop. 38,499
- Village of Willow Springs pop. 5,729
- Village of Wilmette pop. 27,587
- Village of Winnetka pop. 12,475
- Village of Worth pop. 10,708
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