Columbia -- U.S. County in Florida Population (2000): 56513 Housing Units (2000): 23579 Land area (2000): 797.047379 sq. miles (2064.343146 sq. km) Water area (2000): 3.994868 sq. miles (10.346659 sq. km) Total area (2000): 801.042247 sq. miles (2074.689805 sq. km) Located within: Florida (FL), FIPS 12 Location: 30.183900 N, 82.638781 W Headwords: Columbia Columbia, FL Columbia County Columbia County, FL