St. Francis -- U.S. County in Arkansas Population (2000): 29329 Housing Units (2000): 11242 Land area (2000): 633.836524 sq. miles (1641.628992 sq. km) Water area (2000): 8.559861 sq. miles (22.169936 sq. km) Total area (2000): 642.396385 sq. miles (1663.798928 sq. km) Located within: Arkansas (AR), FIPS 05 Location: 35.015874 N, 90.708841 W Headwords: St. Francis St. Francis, AR St. Francis County St. Francis County, AR