Clay -- U.S. County in Alabama Population (2000): 14254 Housing Units (2000): 6612 Land area (2000): 605.073966 sq. miles (1567.134311 sq. km) Water area (2000): 0.927817 sq. miles (2.403035 sq. km) Total area (2000): 606.001783 sq. miles (1569.537346 sq. km) Located within: Alabama (AL), FIPS 01 Location: 33.265810 N, 85.842858 W Headwords: Clay Clay, AL Clay County Clay County, AL