 The population density was 342 people per square mile (132/km²).There were 36,121 housing units at an average density of 144 per square mile (56/km²).The racial makeup of the county was 93.63% White, 3.35% Black or African American, 0.12% Native American, 1.61% Asian, 0.02% Pacific Islander, 0.39% from other races, and 0.89% from two or more races.