Mercer -- U.S. County in North Dakota Population (2000): 8644 Housing Units (2000): 4402 Land area (2000): 1045.488660 sq. miles (2707.803083 sq. km) Water area (2000): 66.934601 sq. miles (173.359813 sq. km) Total area (2000): 1112.423261 sq. miles (2881.162896 sq. km) Located within: North Dakota (ND), FIPS 38 Location: 47.284699 N, 101.686375 W Headwords: Mercer Mercer, ND Mercer County Mercer County, ND