There were 21,247 households, of which 32.3% had children under the age of 18 living with them, 42.4% were married couples living together, 17.5% had a female householder with no husband present, 5.1% had a male householder with no wife present, and 35.0% were non-families. 29.9% of all households were made up of individuals, and 12.2% had someone living alone who was 65 years of age or older. The average household size was 2.42 and the average family size was 3.00.