As of the 2010 United States Census, there were 384,504 people, 145,194 households, and 89,357 families residing in the county. The population density was . There were 161,725 housing units at an average density of . The racial makeup of the county was 47.3% white, 45.9% black or African American, 2.2% Asian, 0.3% American Indian, 0.1% Pacific islander, 1.9% from other races, and 2.2% from two or more races. Those of Hispanic or Latino origin made up 4.8% of the population. In terms of ancestry, 9.6% were German, 8.6% were English, 7.6% were Irish, and 7.1% were American.