Mounds, IL -- U.S. city in Illinois Population (2000): 1117 Housing Units (2000): 504 Land area (2000): 1.215597 sq. miles (3.148382 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.215597 sq. miles (3.148382 sq. km) FIPS code: 50777 Located within: Illinois (IL), FIPS 17 Location: 37.114838 N, 89.199030 W ZIP Codes (1990): 62964 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Mounds, IL Mounds