Carroll -- U.S. County in Maryland Population (2000): 150897 Housing Units (2000): 54260 Land area (2000): 449.125379 sq. miles (1163.229343 sq. km) Water area (2000): 3.271322 sq. miles (8.472686 sq. km) Total area (2000): 452.396701 sq. miles (1171.702029 sq. km) Located within: Maryland (MD), FIPS 24 Location: 39.553101 N, 77.010919 W Headwords: Carroll Carroll, MD Carroll County Carroll County, MD