Boone -- U.S. County in Missouri Population (2000): 135454 Housing Units (2000): 56678 Land area (2000): 685.430111 sq. miles (1775.255762 sq. km) Water area (2000): 5.880998 sq. miles (15.231715 sq. km) Total area (2000): 691.311109 sq. miles (1790.487477 sq. km) Located within: Missouri (MO), FIPS 29 Location: 38.989761 N, 92.313387 W Headwords: Boone Boone, MO Boone County Boone County, MO