Williams, IA -- U.S. city in Iowa Population (2000): 427 Housing Units (2000): 193 Land area (2000): 0.876788 sq. miles (2.270870 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.876788 sq. miles (2.270870 sq. km) FIPS code: 85800 Located within: Iowa (IA), FIPS 19 Location: 42.487464 N, 93.543190 W ZIP Codes (1990): 50271 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Williams, IA Williams