 In terms of ancestry, 28.1% were American, 7.8% were English, 7.7% were Irish, and 6.3% were German.Of the 23,928 households, 34.9% had children under the age of 18 living with them, 51.6% were married couples living together, 15.1% had a female householder with no husband present, 28.5% were non-families, and 24.5% of all households were made up of individuals.The average household size was 2.56 and the average family size was 3.02.