 The population density was 962 people per square mile (371/km²).There were 216,918 housing units at an average density of 390 per square mile (151/km²).The racial makeup of the county was 90.98% White, 2.03% Black or African American, 0.24% Native American, 1.26% Asian, 0.03% Pacific Islander, 3.12% from other races, and 2.34% from two or more races.