There were 17,863 households, of which 26.3% had children under the age of 18 living with them, 42.1% were married couples living together, 9.6% had a female householder with no husband present, 4.1% had a male householder with no wife present, and 44.1% were non-families. Of all households 34.9% were made up of individuals, and 11.7% had someone living alone who was 65 years of age or older. The average household size was 2.20 and the average family size was 2.86.