There were 7,984 households, of which 33.5% had children under the age of 18 living with them, 55.3% were married couples living together, 9.1% had a female householder with no husband present, 4.3% had a male householder with no wife present, and 31.3% were non-families. 23.4% of all households were made up of individuals, and 7.9% had someone living alone who was 65 years of age or older. The average household size was 2.55 and the average family size was 3.01.