As of the census of 2010, there were 304,204 people, 124,682 households, and 74,521 families residing in the county. The population density was 563 people per square mile (217/km2). There were 134,072 housing units at an average density of 248 per square mile (96/km2). The racial makeup of the county was 78.2% White, 12.7% Black or African American, 0.2% Native American, 4.8% Asian, 0.0% Pacific Islander, 1.6% from other races, and 2.5% from two or more races. 4.9% of the population were Hispanic or Latino of any race. 19.2% were of Irish, 16.0% Italian, 11.0% German, 6.1% English and 5.1% Polish ancestry according to Census 2000. 90.4% spoke English, 2.7% Spanish and 1.0% Italian as their first language.