As of the 2000 census, there were 18,418 people, 6,971 households, and 4,830 families residing in the county. The population density was 29 people per square mile (11/km2). There were 7,956 housing units at an average density of 13 per square mile (5/km2). The racial makeup of the county was 80.57% White, 17.56% Black or African American, 0.33% Native American, 0.18% Asian, 0.01% Pacific Islander, 0.40% from other races, and 0.95% from two or more races. 1.27% of the population were Hispanic or Latino of any race.