There were 17,009 households, of which 43.6% had children under the age of 18 living with them, 67.8% were married couples living together, 10.7% had a female householder with no husband present, 4.3% had a male householder with no wife present, and 17.1% were non-families. Of all households 2.4% 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 3.03 and the average family size was 3.30.