 0.77% of the population were Hispanic or Latino of any race.32.2% were of German, 26.0% Norwegian and 5.2% Swedish ancestry.There were 11,844 households out of which 31.30% had children under the age of 18 living with them, 57.10% were married couples living together, 7.90% had a female householder with no husband present, and 30.90% were non-families.