Stillwater -- U.S. County in Montana Population (2000): 8195 Housing Units (2000): 3947 Land area (2000): 1795.088102 sq. miles (4649.256643 sq. km) Water area (2000): 9.521573 sq. miles (24.660760 sq. km) Total area (2000): 1804.609675 sq. miles (4673.917403 sq. km) Located within: Montana (MT), FIPS 30 Location: 45.630108 N, 109.366310 W Headwords: Stillwater Stillwater, MT Stillwater County Stillwater County, MT