As of the 2010 United States Census, there were 21,992 people, 8,522 households, and 5,906 families living in the county. The population density was . There were 9,957 housing units at an average density of . The racial makeup of the county was 57.9% white, 39.1% African American, 0.6% Asian, 0.4% American Indian, 0.7% from other races, and 1.2% from two or more races. Those of Hispanic or Latino origin made up 1.6% of the population. In terms of ancestry, 14.3% were American, 12.7% were English, and 9.8% were Irish.