 Of the 170,479 households, 42.3% had children under the age of 18 living with them, 59.2% were married couples living together, 11.0% had a female householder with no husband present, 24.7% were non-families, and 19.8% of all households were made up of individuals.The average household size was 2.98 and the average family size was 3.45.The median age was 34.5 years.