Martin -- U.S. County in Florida Population (2000): 126731 Housing Units (2000): 65471 Land area (2000): 555.615604 sq. miles (1439.037748 sq. km) Water area (2000): 197.177314 sq. miles (510.686877 sq. km) Total area (2000): 752.792918 sq. miles (1949.724625 sq. km) Located within: Florida (FL), FIPS 12 Location: 27.132403 N, 80.255862 W Headwords: Martin Martin, FL Martin County Martin County, FL