Dayton, WY -- U.S. town in Wyoming Population (2000): 678 Housing Units (2000): 304 Land area (2000): 0.474411 sq. miles (1.228719 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.474411 sq. miles (1.228719 sq. km) FIPS code: 19385 Located within: Wyoming (WY), FIPS 56 Location: 44.874952 N, 107.264851 W ZIP Codes (1990): 82836 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Dayton, WY Dayton