As of 2010, there were 24,394 households, with 13.0% being vacant. In 2000, there were 16,576 households, out of which 51.3% had children under the age of 18 living with them, 71.0% were married couples living together, 9.0% had a female householder with no husband present and 17.6% were non-families. 13.8% of all households were made up of individuals, and 3.3% had someone living alone who was 65 years of age or older. The average household size was 2.97 and the average family size was 3.29.