Park Forest, IL -- U.S. village in Illinois Population (2000): 23462 Housing Units (2000): 9470 Land area (2000): 4.925243 sq. miles (12.756319 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 4.925243 sq. miles (12.756319 sq. km) FIPS code: 57732 Located within: Illinois (IL), FIPS 17 Location: 41.483979 N, 87.687054 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Park Forest, IL Park Forest