Of the 12,347 households, 33.3% had children under the age of 18 living in them, 49.9% were opposite-sex married couples living together, 8.4%had a female householder with no husband present, and 3.0% had a male householder with no wife present. About 5.2% were unmarried opposite-sex partnerships, and 0.8% were same-sex married couples or partnerships. About 29.7% were made up of individuals, and 11.1% had someone living alone who was 65 years of age or older. The average household size was 2.53. The average family size was 3.20.