Madison -- U.S. County in Alabama Population (2000): 276700 Housing Units (2000): 120288 Land area (2000): 804.922458 sq. miles (2084.739506 sq. km) Water area (2000): 7.927644 sq. miles (20.532503 sq. km) Total area (2000): 812.850102 sq. miles (2105.272009 sq. km) Located within: Alabama (AL), FIPS 01 Location: 34.730790 N, 86.588226 W Headwords: Madison Madison, AL Madison County Madison County, AL