Monrovia, IN -- U.S. town in Indiana Population (2000): 628 Housing Units (2000): 245 Land area (2000): 0.885653 sq. miles (2.293830 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.885653 sq. miles (2.293830 sq. km) FIPS code: 50580 Located within: Indiana (IN), FIPS 18 Location: 39.579389 N, 86.480402 W ZIP Codes (1990): 46157 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Monrovia, IN Monrovia