Charles -- U.S. County in Maryland Population (2000): 120546 Housing Units (2000): 43903 Land area (2000): 461.001190 sq. miles (1193.987549 sq. km) Water area (2000): 182.215845 sq. miles (471.936852 sq. km) Total area (2000): 643.217035 sq. miles (1665.924401 sq. km) Located within: Maryland (MD), FIPS 24 Location: 38.522057 N, 76.972271 W Headwords: Charles Charles, MD Charles County Charles County, MD