Marshall -- U.S. County in Mississippi Population (2000): 34993 Housing Units (2000): 13252 Land area (2000): 706.326294 sq. miles (1829.376626 sq. km) Water area (2000): 3.473399 sq. miles (8.996063 sq. km) Total area (2000): 709.799693 sq. miles (1838.372689 sq. km) Located within: Mississippi (MS), FIPS 28 Location: 34.771173 N, 89.494835 W Headwords: Marshall Marshall, MS Marshall County Marshall County, MS