 In terms of ancestry, 39.5% were German, 12.5% were American, 11.0% were Irish, and 9.1% were English.Of the 3,940  households, 29.7% had children under the age of 18 living with them, 59.1% were married couples living together, 7.9% had a female householder with no husband present, 28.9% were non-families, and 24.5% of all households were made up of individuals.The average household size was 2.45 and the average family size was 2.90.