Marion -- U.S. County in Florida Population (2000): 258916 Housing Units (2000): 122663 Land area (2000): 1578.858296 sq. miles (4089.224040 sq. km) Water area (2000): 84.153254 sq. miles (217.955919 sq. km) Total area (2000): 1663.011550 sq. miles (4307.179959 sq. km) Located within: Florida (FL), FIPS 12 Location: 29.142855 N, 82.114602 W Headwords: Marion Marion, FL Marion County Marion County, FL