Monroe City, IN -- U.S. town in Indiana Population (2000): 548 Housing Units (2000): 259 Land area (2000): 0.268704 sq. miles (0.695940 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.268704 sq. miles (0.695940 sq. km) FIPS code: 50526 Located within: Indiana (IN), FIPS 18 Location: 38.615891 N, 87.355232 W ZIP Codes (1990): 47557 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Monroe City, IN Monroe City