 5.11% of the population were Hispanic or Latino of any race.50.9% were of German, 16.3% Norwegian and 5.1% Swedish ancestry.There were 6,779 households out of which 31.50% had children under the age of 18 living with them, 59.10% were married couples living together, 5.60% had a female householder with no husband present, and 31.80% were non-families.