As of the 2010 United States Census, there were 152,691 people, 54,477 households, and 36,707 families living in the county. The population density was . There were 57,963 housing units at an average density of . The racial makeup of the county was 89.8% white, 3.4% Asian, 3.3% black or African American, 0.2% American Indian, 1.6% from other races, and 1.8% from two or more races. Those of Hispanic or Latino origin made up 4.3% of the population. In terms of ancestry, 22.0% were Irish, 16.8% were Italian, 14.3% were English, 14.2% were German, 10.6% were Polish, 5.6% were French Canadian, and 3.5% were American.