As of the 2010 United States Census, there were 916,829 people, 335,545 households, and 232,896 families residing in the county. The population density was . There were 361,221 housing units at an average density of . The racial makeup of the county was 74.8% white, 10.8% black or African American, 4.6% Asian, 0.3% American Indian, 6.8% from other races, and 2.6% from two or more races. Those of Hispanic or Latino origin made up 16.9% of the population. In terms of ancestry, 18.1% were Italian, 15.9% were Irish, 9.8% were German, 8.7% were English, 5.5% were Polish, and 2.7% were American.