Mount Auburn, IN -- U.S. town in Indiana Population (2000): 75 Housing Units (2000): 34 Land area (2000): 0.222077 sq. miles (0.575176 sq. km) Water area (2000): 0.009185 sq. miles (0.023790 sq. km) Total area (2000): 0.231262 sq. miles (0.598966 sq. km) FIPS code: 51318 Located within: Indiana (IN), FIPS 18 Location: 39.812879 N, 85.191863 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Mount Auburn, IN Mount Auburn