 The population density was 570 people per square mile (220/km2).There were 182,467 housing units at an average density of 319 per square mile (123/km2).The racial makeup of the county was 92.65% White, 4.18% Black or African American, 0.22% Native American, 0.77% Asian, 0.03% Pacific Islander, 1.14% from other races, and 1.02% from two or more races.