There were 11,973 households, of which 36.5% had children under the age of 18 living with them, 50.7% were married couples living together, 12.4% had a female householder with no husband present, 5.4% had a male householder with no wife present, and 31.5% were non-families. 23.5% of all households were made up of individuals, and 8.3% had someone living alone who was 65 years of age or older. The average household size was 2.61 and the average family size was 3.07.