 In terms of ancestry, 13.0% were American, 11.6% were German, 10.9% were English, and 10.7% were Irish.Of the 176,531 households, 33.7% had children under the age of 18 living with them, 49.7% were married couples living together, 13.5% had a female householder with no husband present, 32.4% were non-families, and 27.0% of all households were made up of individuals.The average household size was 2.49 and the average family size was 3.03.