As of the Census of 2010, there were 718,633 people, 277,615 households, and 172,572 families residing in the county. The population density was 1,013 people per square mile (391/km2). There were 319,828 housing units at an average density of 416 per square mile (161/km2). The racial makeup of the county was 64.6% White, 15.4% Black or African American, 3.5% Native American, 3% Asian, 0.1% Pacific Islander, 8.1% from other races, and 5.3% from two or more races. 15.1% of the population were Hispanic or Latino of any race. 12.4% were of German, 12.3% Mexican, 10.1% Irish, 7.9% English, and 7.7% American ancestries according to the Census 2010. 84.4% spoke English and 11.5% Spanish as their first language.