Riverton, WY -- U.S. city in Wyoming Population (2000): 9310 Housing Units (2000): 4254 Land area (2000): 9.776898 sq. miles (25.322049 sq. km) Water area (2000): 0.002903 sq. miles (0.007518 sq. km) Total area (2000): 9.779801 sq. miles (25.329567 sq. km) FIPS code: 66220 Located within: Wyoming (WY), FIPS 56 Location: 43.027838 N, 108.395077 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Riverton, WY Riverton