As of the census of 2010, there were 306,935 people, 127,111 households, and 69,846 families residing in the county. The population density was 1,252 people per square mile (487/km2). As of 2019, there were 139,274 housing units at an average density of 568 per square mile (183/km2). In 2018, the racial makeup of the county was 57% (185,772) White, 29.5% (96,112) Black or African American, 0.2% (728) Native American, 8.2% (26,557) Asian, 0.03% (95) Pacific Islander, 0.98% (3,106) from other races, and 3.1% (10,232) from two or more races. About 5.5% (17,959) of the population was Hispanic or Latino of any race.