Caroline -- U.S. County in Maryland Population (2000): 29772 Housing Units (2000): 12028 Land area (2000): 320.140764 sq. miles (829.160736 sq. km) Water area (2000): 5.917079 sq. miles (15.325163 sq. km) Total area (2000): 326.057843 sq. miles (844.485899 sq. km) Located within: Maryland (MD), FIPS 24 Location: 38.875199 N, 75.830758 W Headwords: Caroline Caroline, MD Caroline County Caroline County, MD