Houston -- U.S. County in Alabama Population (2000): 88787 Housing Units (2000): 39571 Land area (2000): 580.359670 sq. miles (1503.124582 sq. km) Water area (2000): 1.294098 sq. miles (3.351697 sq. km) Total area (2000): 581.653768 sq. miles (1506.476279 sq. km) Located within: Alabama (AL), FIPS 01 Location: 31.189731 N, 85.350387 W Headwords: Houston Houston, AL Houston County Houston County, AL