Jefferson -- U.S. County in Alabama Population (2000): 662047 Housing Units (2000): 288162 Land area (2000): 1112.607142 sq. miles (2881.639146 sq. km) Water area (2000): 11.196409 sq. miles (28.998564 sq. km) Total area (2000): 1123.803551 sq. miles (2910.637710 sq. km) Located within: Alabama (AL), FIPS 01 Location: 33.527872 N, 86.828050 W Headwords: Jefferson Jefferson, AL Jefferson County Jefferson County, AL