Harford -- U.S. County in Maryland Population (2000): 218590 Housing Units (2000): 83146 Land area (2000): 440.349429 sq. miles (1140.499738 sq. km) Water area (2000): 86.368111 sq. miles (223.692372 sq. km) Total area (2000): 526.717540 sq. miles (1364.192110 sq. km) Located within: Maryland (MD), FIPS 24 Location: 39.534674 N, 76.290245 W Headwords: Harford Harford, MD Harford County Harford County, MD