As of the 2010 United States Census, there were 265,128 people, 103,038 households, and 64,613 families residing in the county. The population density was . There were 119,323 housing units at an average density of . The racial makeup of the county was 52.8% white, 40.1% black or African American, 2.4% Asian, 0.3% American Indian, 0.1% Pacific islander, 2.2% from other races, and 2.1% from two or more races. Those of Hispanic or Latino origin made up 5.4% of the population. In terms of ancestry, 9.8% were Irish, 8.7% were English, 7.9% were German, and 4.6% were American.