Simpson, IL -- U.S. village in Illinois Population (2000): 54 Housing Units (2000): 25 Land area (2000): 0.522078 sq. miles (1.352176 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.522078 sq. miles (1.352176 sq. km) FIPS code: 70005 Located within: Illinois (IL), FIPS 17 Location: 37.467977 N, 88.756277 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Simpson, IL Simpson