Cook County, Illinois
Cook County is a county in Illinois with an estimated population of 5,087,072 in 2023. 119 cities, towns and Census places in it are indexed here.
Largest places in Cook County
Chicago 2,664,452Cicero 81,004Schaumburg 75,750Evanston 75,070Arlington Heights 74,495Skokie 64,937Palatine 64,869Des Plaines 58,010Orland Park 57,074Oak Lawn 55,734Berwyn 54,414Mount Prospect 54,298Tinley Park 53,886Oak Park 52,055Hoffman Estates 50,179Glenview 46,904Park Ridge 37,897Streamwood 37,780Wheeling 37,725Hanover Park 36,165Calumet City 34,358Northbrook 33,977Elk Grove Village 31,350Niles 29,513Burbank 28,164Lansing 27,713Wilmette 27,026Oak Forest 26,199Chicago Heights 26,184Morton Grove 24,131Melrose Park 23,666Elmwood Park 23,369Rolling Meadows 23,329Maywood 22,880Blue Island 21,494Park Forest 20,763South Holland 20,483Dolton 20,410Harvey 19,397Evergreen Park 19,010
About Cook County
Cook County is one of the counties of Illinois. County governments in Illinois handle local services such as courts, property records and elections; cities and towns inside the county run their own municipal services. Population figures come from the Census Bureau's Vintage 2023 estimates, which are updated annually.