As of the 2010 census, there were 201,081 people, 80,665 households, and 42,737 families residing in the county. The population density was . There were 87,569 housing units at an average density of . The racial makeup of the county was 73.4% white, 12.4% black or African American, 8.9% Asian, 0.3% American Indian, 0.1% Pacific islander, 2.2% from other races, and 2.7% from two or more races. Those of Hispanic or Latino origin made up 5.3% of the population. In terms of ancestry, 23.9% were German, 12.2% were Irish, 11.5% were American, and 8.9% were English.