Of the 4,178 households, 25.8% had children under the age of 18 living with them, 43.2% were headed by married couples living together, 11.8% had a female householder with no husband present, and 39.8% were non-families. 33.3% of all households were made up of individuals, and 15.2% were someone living alone who was 65 years of age or older. The average household size was 2.18, and the average family size was 2.71. 955 city residents lived in group quarters rather than households.