Simms, MT -- U.S. Census Designated Place in Montana Population (2000): 373 Housing Units (2000): 160 Land area (2000): 7.698650 sq. miles (19.939410 sq. km) Water area (2000): 0.011148 sq. miles (0.028873 sq. km) Total area (2000): 7.709798 sq. miles (19.968283 sq. km) FIPS code: 68575 Located within: Montana (MT), FIPS 30 Location: 47.489984 N, 111.932102 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Simms, MT Simms