Klein, MT -- U.S. Census Designated Place in Montana Population (2000): 188 Housing Units (2000): 90 Land area (2000): 12.852306 sq. miles (33.287319 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 12.852306 sq. miles (33.287319 sq. km) FIPS code: 41050 Located within: Montana (MT), FIPS 30 Location: 46.402844 N, 108.548378 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Klein, MT Klein