Dillon, MT -- U.S. city in Montana Population (2000): 3752 Housing Units (2000): 1831 Land area (2000): 1.630822 sq. miles (4.223810 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.630822 sq. miles (4.223810 sq. km) FIPS code: 20800 Located within: Montana (MT), FIPS 30 Location: 45.215735 N, 112.634055 W ZIP Codes (1990): 59725 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Dillon, MT Dillon