There were 19,840 households, of which 30.8% had children under the age of 18 living with them, 40.7% were married couples living together, 14.8% had a female householder with no husband present, 5.3% had a male householder with no wife present, and 39.2% were non-families. 31.9% of all households were made up of individuals, and 12.3% had someone living alone who was 65 years of age or older. The average household size was 2.35 and the average family size was 2.94.