As of the 2010 United States Census, there were 259,424 people, 90,633 households, and 62,389 families residing in the county. The population density was . There were 104,705 housing units at an average density of . The racial makeup of the county was 66.1% black or African American, 18.87% white, 5.0% Asian, 0.4% American Indian, 0.1% Pacific islander, 7.1% from other races, and 2.5% from two or more races. Those of Hispanic or Latino origin made up 13.66% of the population. In terms of ancestry, and 4.9% were "American".