Mount Sterling, IA -- U.S. city in Iowa Population (2000): 40 Housing Units (2000): 22 Land area (2000): 0.400086 sq. miles (1.036219 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.400086 sq. miles (1.036219 sq. km) FIPS code: 54750 Located within: Iowa (IA), FIPS 19 Location: 40.618058 N, 91.933898 W ZIP Codes (1990): 52573 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Mount Sterling, IA Mount Sterling