Mansfield, IL -- U.S. village in Illinois Population (2000): 949 Housing Units (2000): 424 Land area (2000): 0.511243 sq. miles (1.324114 sq. km) Water area (2000): 0.025020 sq. miles (0.064801 sq. km) Total area (2000): 0.536263 sq. miles (1.388915 sq. km) FIPS code: 46487 Located within: Illinois (IL), FIPS 17 Location: 40.212795 N, 88.507416 W ZIP Codes (1990): 61854 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Mansfield, IL Mansfield