As of the 2010 United States Census, there were 20,510 people, 8,698 households, and 4,639 families residing in the city. The population density was 2,579.5 people per square mile (996/km). There were 9,311 housing units at an average density of 1,171 per square mile (452.1/km). The racial makeup of the city was 92.8% Caucasian American, 1.1% African American, 0.3% American Indian, 1.8% Asian, 2.1% from other races, and 1.8% from two or more races. Hispanics and Latinos of any race were 4.7% of the population.