Avon, MT -- U.S. Census Designated Place in Montana Population (2000): 124 Housing Units (2000): 62 Land area (2000): 13.362697 sq. miles (34.609225 sq. km) Water area (2000): 0.004275 sq. miles (0.011073 sq. km) Total area (2000): 13.366972 sq. miles (34.620298 sq. km) FIPS code: 03175 Located within: Montana (MT), FIPS 30 Location: 46.599204 N, 112.598899 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Avon, MT Avon