There were 21,920 households. Of these, 34.60% had children under the age of 18 living with them, 49.10% were married couples living together, 17.90% had a female householder with no husband present, and 28.80% were non-families. 24.90% of all households were made up of individuals and 10.20% 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 3.12.