 Of the 12,105 households, 36.1% had children under the age of 18 living with them, 55.5% were married couples living together, 11.1% had a female householder with no husband present, 27.7% were non-families, and 23.1% of all households were made up of individuals.The average household size was 2.68 and the average family size was 3.13.The median age was 37.5 years.