Ironton, OH -- U.S. city in Ohio Population (2000): 11211 Housing Units (2000): 5507 Land area (2000): 4.134988 sq. miles (10.709570 sq. km) Water area (2000): 0.263217 sq. miles (0.681729 sq. km) Total area (2000): 4.398205 sq. miles (11.391299 sq. km) FIPS code: 37464 Located within: Ohio (OH), FIPS 39 Location: 38.530720 N, 82.678309 W ZIP Codes (1990): 45638 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Ironton, OH Ironton