Ironton, MO -- U.S. city in Missouri Population (2000): 1471 Housing Units (2000): 683 Land area (2000): 1.358048 sq. miles (3.517327 sq. km) Water area (2000): 0.043791 sq. miles (0.113419 sq. km) Total area (2000): 1.401839 sq. miles (3.630746 sq. km) FIPS code: 35468 Located within: Missouri (MO), FIPS 29 Location: 37.600455 N, 90.631627 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Ironton, MO Ironton