 In terms of ancestry, 27.5% were English, 17.0% were German, 7.2% were Swedish, 7.0% were Danish, 5.0% were Irish, and 4.3% were American.Of the 2,606 households, 35.0% had children under the age of 18 living with them, 64.3% were married couples living together, 6.1% had a female householder with no husband present, 25.7% were non-families, and 22.9% of all households were made up of individuals.The average household size was 2.64 and the average family size was 3.12.