Carter -- U.S. County in Montana Population (2000): 1360 Housing Units (2000): 811 Land area (2000): 3339.566538 sq. miles (8649.437259 sq. km) Water area (2000): 8.728321 sq. miles (22.606246 sq. km) Total area (2000): 3348.294859 sq. miles (8672.043505 sq. km) Located within: Montana (MT), FIPS 30 Location: 45.556276 N, 104.481226 W Headwords: Carter Carter, MT Carter County Carter County, MT