Cities, Towns, Neighborhoods & Other Populated Places in Cook County.
| City Name | Title | County | Population |
|---|---|---|---|
| Markham | City in Cook County, Illinois, United States | 328,966 | |
| Elk Grove | Township in Cook County, Illinois | 91,251 | |
| West Town | 86,429 | ||
| Near North Side | 85,711 | ||
| Cicero | Town in Illinois | 80,796 | |
| Belmont Cragin | 79,159 | ||
| Arlington Heights | Village in Cook County, Illinois, United States; suburb of Chicago, Illinois | 75,101 | |
| South Lawndale | 73,826 | ||
| Logan Square | 73,702 | ||
| Evanston | Suburban city in Cook County, Illinois, United States | 73,473 | |
| Schaumburg | Large village located in Cook County in Illinois, USA | 72,887 | |
| West Ridge | 72,211 | ||
| Palatine | Village in Cook County, Illinois, United States | 67,482 | |
| Lincoln Park | 66,959 | ||
| Portage Park | 64,841 | ||
| Skokie | Village in Cook County, Illinois, United States | 62,700 | |
| Des Plaines | City in Cook County, Illinois | 58,899 | |
| Orland Park | Village in Illinois | 57,857 | |
| Irving Park | 56,520 | ||
| Tinley Park | Village located in Cook County, Illinois, United States | 55,773 | |
| Chicago Lawn | 55,551 | ||
| Uptown | 55,137 | ||
| Oak Lawn | Village in Illinois, United States of America | 55,022 | |
| Edgewater | 54,873 | ||
| Rogers Park | 54,402 | ||
| Berwyn | City in Illinois | 54,391 | |
| Mount Prospect | Village in Elk Grove and Wheeling Townships in Cook County, Illinois, United States | 53,719 | |
| Oak Park | Village in Cook County, Illinois, United States; suburb of Chicago, Illinois | 52,381 | |
| Albany Park | 52,079 | ||
| South Shore | 51,451 | ||
| Hoffman Estates | Northwestern suburb of Chicago in Illinois, United States | 50,932 | |
| Glenview | Village in Cook County, Illinois, United States | 47,446 | |
| Brighton Park | 44,202 | ||
| Ashburn | 42,752 | ||
| Buffalo Grove | Village in Illinois, United States of America | 41,496 | |
| Gage Park | 41,202 | ||
| New City | 40,997 | ||
| Lincoln Square | 40,761 | ||
| Bartlett | Village in United States of America | 40,647 | |
| Avondale | 39,721 | ||
| Streamwood | Village in United States of America | 39,228 | |
| Wheeling | City in West Virginia | 38,646 | |
| Hanover Park | Village in United States of America | 37,426 | |
| Park Ridge | City in Cook County, Illinois, United States | 36,950 | |
| Calumet City | City in Illinois | 35,913 | |
| North Lawndale | 35,276 | ||
| North Center | 34,623 | ||
| Lower West Side | 34,410 | ||
| Bridgeport | 33,878 | ||
| Northbrook | Village in Illinois | 32,958 | |
| West Lawn | 32,749 | ||
| Elk Grove Village | City in Illinois, United States of America | 32,400 | |
| West Englewood | 32,156 | ||
| Chatham | 31,392 | ||
| Chicago Heights | City in Cook County, Illinois, United States | 29,322 | |
| Niles | City in Trumbull County, Ohio | 28,938 | |
| Burbank | City in Cook County, Illinois, United States | 28,289 | |
| South Chicago | Former township in Cook County, Illinois | 28,095 | |
| Lansing | Village in Illinois, USA | 27,402 | |
| Oak Forest | City in Cook County, Illinois | 27,173 | |
| Wilmette | Village in Cook County, Illinois, United States | 27,089 | |
| Hyde Park | 26,893 | ||
| Englewood | 26,121 | ||
| Melrose Park | Village in Cook County, Illenois, United States of America | 24,703 | |
| Harvey | City in Cook County, Illinois, United States | 24,408 | |
| Woodlawn | 24,150 | ||
| Elmwood Park | Village in Cook County, Illinois, United States | 24,098 | |
| Rolling Meadows | City in Cook County, Illinois, United States | 23,532 | |
| Maywood | Village in Cook County, Illinois, United States | 23,158 | |
| Morgan Park | 22,924 | ||
| Blue Island | City in Illinois, United States | 22,899 | |
| Morton Grove | Village in United States of America | 22,796 | |
| Near South Side | 22,401 | ||
| Grand Boulevard | 22,373 | ||
| Dolton | Village in Cook County, Illinois, United States | 22,348 | |
| South Holland | Village in Illinois, United States | 21,296 | |
| Park Forest | Village in United States of America | 21,210 | |
| East Garfield Park | 20,656 | ||
| Douglas | 20,323 | ||
| Calumet | City in Illinois | 20,103 | |
| Matteson | Village in United States of America | 19,448 | |
| West Elsdon | 19,219 | ||
| Evergreen Park | Village in Cook County, Illinois, United States | 19,147 | |
| Mount Greenwood | 18,783 | ||
| Alsip | Village in Cook County, Illinois, United States | 18,709 | |
| Homewood | Village in Cook County, Illinois, United States | 18,703 | |
| Bellwood | Village in United States of America | 18,672 | |
| Brookfield | Village in Cook County, Illinois (United States of America) | 18,310 | |
| West Garfield Park | 17,742 | ||
| Franklin Park | Village in Illinois | 17,627 | |
| Kenwood | 17,601 | ||
| Lemont | Historic village in the U. | 17,291 | |
| Palos Hills | City in Illinois, United States | 17,060 | |
| Country Club Hills | City in Cook County, Illinois, United States | 16,482 | |
| Westchester | Village in Cook County, Illinois, United States | 16,117 | |
| Bridgeview | Village in United States of America | 16,096 | |
| Prospect Heights | City in Cook County, Illinois, United States | 15,887 | |
| La Grange | 15,723 | ||
| McKinley Park | 15,612 | ||
| Midlothian | Village in Illinois, United States of America | 14,346 |