As of the census of 2000, there were 174,083 people, 65,862 households, and 46,827 families residing in the county. The population density was 221 people per square mile (85/km2). There were 69,868 housing units at an average density of 89 per square mile (34/km2). The racial/ethnic makeup of the county is 96.5% White, 0.9% Black or African American, 0.09% Native American, 0.8% Asian, 0.03% Pacific Islander, 0.17% from other races, 0.7% from two or more races; and 0.9% Hispanic or Latino of any race. 46.7% German, 24.8% Irish, 15.2% Italian, 9.9% English, 9.2% Polish, 6.3% American, 3.7% Scotch-Irish, and 3.1% French ancestry.