There were 12,180 households, of which 27.5% had children under the age of 18 living with them, 39.9% were married couples living together, 11.4% had a female householder with no husband present, 4.2% had a male householder with no wife present, and 44.4% were non-families. 35.2% of all households were made up of individuals, and 7.2% had someone living alone who was 65 years of age or older. The average household size was 2.21 and the average family size was 2.90.