Roosevelt -- U.S. County in Montana Population (2000): 10620 Housing Units (2000): 4044 Land area (2000): 2355.601675 sq. miles (6100.980072 sq. km) Water area (2000): 14.046883 sq. miles (36.381259 sq. km) Total area (2000): 2369.648558 sq. miles (6137.361331 sq. km) Located within: Montana (MT), FIPS 30 Location: 48.208479 N, 104.989043 W Headwords: Roosevelt Roosevelt, MT Roosevelt County Roosevelt County, MT