Chicago Ridge, IL (village, FIPS 14065) Location: 41.70245 N, 87.77864 W
Population (1990): 13643 (5499 housing units)
Area: 5.8 sq km (land), 0.0 sq km (water)
Zip code(s): 60415

Chicago Heights, IL (city, FIPS 14026) Location: 41.50990 N, 87.63757 W
Population (1990): 33072 (11620 housing units)
Area: 23.4 sq km (land), 0.0 sq km (water)

South Chicago Heights, IL (village, FIPS 70629) Location: 41.48330 N, 87.63740 W
Population (1990): 3597 (1491 housing units)
Area: 4.0 sq km (land), 0.0 sq km (water)

East Chicago, IN (city, FIPS 19486) Location: 41.64865 N, 87.45187 W
Population (1990): 33892 (13484 housing units)
Area: 31.0 sq km (land), 9.5 sq km (water)
Zip code(s): 46312

West Chicago, IL (city, FIPS 80060) Location: 41.88989 N, 88.22283 W
Population (1990): 14796 (4877 housing units)
Area: 24.5 sq km (land), 0.0 sq km (water)
Zip code(s): 60185

New Chicago, IN (town, FIPS 52776) Location: 41.55874 N, 87.27222 W
Population (1990): 2066 (800 housing units)
Area: 1.7 sq km (land), 0.0 sq km (water)

North Chicago, IL (city, FIPS 53559) Location: 42.31865 N, 87.85925 W
Population (1990): 34978 (7925 housing units)
Area: 19.2 sq km (land), 0.0 sq km (water)