 The population density was 338 people per square mile (130/km²).There were 141,031 housing units at an average density of 154 per square mile (59/km²).The racial makeup of the county was 61.9% White, 34.5% Black or African American, 0.26% Native American, 1.12% Asian, 0.06% Pacific Islander, 0.99% from other races, and 1.16% from two or more races.