 In terms of ancestry, 29.9% were English, 22.7% were German, 7.6% were Irish, 6.1% were American, 5.7% were Scottish, and 5.1% were Danish.Of the 4,436 households, 38.7% had children under the age of 18 living with them, 65.9% were married couples living together, 7.2% had a female householder with no husband present, 22.5% were non-families, and 19.7% of all households were made up of individuals.The average household size was 2.88 and the average family size was 3.32.