Franklin -- U.S. County in Ohio Population (2000): 1068978 Housing Units (2000): 471016 Land area (2000): 539.868665 sq. miles (1398.253363 sq. km) Water area (2000): 3.454890 sq. miles (8.948123 sq. km) Total area (2000): 543.323555 sq. miles (1407.201486 sq. km) Located within: Ohio (OH), FIPS 39 Location: 39.990514 N, 82.996532 W Headwords: Franklin Franklin, OH Franklin County Franklin County, OH