As of the 2010 United States Census, there were 306,479 people, 93,545 households, and 76,205 families in the county. The population density was 1,025/sqmi (396/km2). There were 97,570 housing units at an average density of 320.95 per square mile (123.66/km2). The racial makeup of the county was 90.04% White, 1.21% Black or African American, 0.46% Native American, 1.77% Asian, 0.59% Pacific Islander, 3.24% from other races, and 2.69% from two or more races. 8.42% of the population were Hispanic or Latino of any race.