 The population density was 3,703.5 people per square mile (1,432.4/km2).There were 4,144 housing units at an average density of 1,783.1 per square mile (689.7/km2).The racial makeup of the borough was 91.01% White, 6.53% African American, 0.06% Native American, 0.64% Asian, 0.08% Pacific Islander, 0.19% from other races, and 1.50% from two or more races.