Keensburg, IL -- U.S. village in Illinois Population (2000): 252 Housing Units (2000): 111 Land area (2000): 0.257511 sq. miles (0.666951 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.257511 sq. miles (0.666951 sq. km) FIPS code: 39259 Located within: Illinois (IL), FIPS 17 Location: 38.350719 N, 87.867515 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Keensburg, IL Keensburg