 The population density was 4,220.3 people per square mile (1,628.8/km²).There were 21,831 housing units at an average density of 2,045.0 per square mile (789.2/km²).The racial makeup of the city was 85.28% White, 1.59% African American, 0.53% Native American, 7.80% Asian, 0.20% Pacific Islander, 1.69% from other races, and 2.92% from two or more races.