2020 census As of the census of 2020, the population was 406,978. The population density was . There were 172,177 housing units at an average density of . The racial makeup of the county was 87.0% White, 3.9% Asian, 1.7% Black or African American, 0.3% Native American, 1.5% from other races, and 5.7% from two or more races. Ethnically, the population was 5.4% Hispanic or Latino of any race.
2020 census As of the census of 2020, the population was 406,978. The population density was . There were 172,177 housing units at an average density of  The racial makeup of the county was 87.0% White 3.9% Asian 1.7% Black or African American, 0.3% Native American, 1.5% from other races and 5.7% from two or more races. Ethnically, the population was 5.4% Hispanic or Latino of any race.