 There were 782,664 households out of which 31.5% included children under the age of 18; 46.9% were married couples living together, 16.0% had a female householder with no husband present, and 31.3% were non-families.25.6% of all households were made up of individuals and 9.7% had someone living alone who was 65 years of age or older.The average household size was 2.81 and the average family size was 3.39.