There were 16,688 households, out of which 48.4% had children under the age of 18 living with them, 65.4% were married couples living together, 3.9% had a male householder with no wife present, 8.5% had a female householder with no husband present, and 22.3% were non-families. 17.7% of all households were made up of individuals, and 4.0% had someone living alone who was 65 years of age or older. The average household size was 2.86, and the average family size was 3.27.