 There were 20,772 housing units at an average density of 145/sq mi (56/km²).The racial makeup of the county was 80.3% White, 13.1% Black or African American, 0.3% Native American, 2.2% Asian, 0.1% Pacific Islander, 1.4% from other races, and 2.6% from two or more races.4.5% of the population were Hispanic or Latino of any race.