 1.80% of the population were Hispanic or Latino of any race.49.2% were of German, 13.3% Norwegian, 6.8% Swedish and 5.4% Irish ancestry.There were 10,642 households out of which 35.30% had children under the age of 18 living with them, 57.50% were married couples living together, 7.90% had a female householder with no husband present, and 31.30% were non-families.