Irondale, MO -- U.S. city in Missouri Population (2000): 437 Housing Units (2000): 198 Land area (2000): 0.543666 sq. miles (1.408089 sq. km) Water area (2000): 0.016368 sq. miles (0.042394 sq. km) Total area (2000): 0.560034 sq. miles (1.450483 sq. km) FIPS code: 35396 Located within: Missouri (MO), FIPS 29 Location: 37.835204 N, 90.672505 W ZIP Codes (1990): 63648 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Irondale, MO Irondale