As of the census of 2000, there were 4,358 people, 1,505 households, and 1,249 families living in the city. The population density was 166.9 people per square mile (64.4/km). There were 1,567 housing units at an average density of 60.0 per square mile (23.2/km). The racial makeup of the city was 97.06% White, 0.34% African American, 0.21% Native American, 1.47% Asian, 0.50% from other races, and 0.41% from two or more races. Hispanic or Latino of any race were 0.67% of the population. 32.0% were of German, 16.1% Norwegian, 9.9% Swedish, 7.4% Irish and 6.0% English ancestry according to Census 2000.