As of the census of 2000, there were 5,555 people, 1,921 households, and 1,586 families living in the city. The population density was 320.7 people per square mile (123.8/km2). There were 1,979 housing units at an average density of 114.3 per square mile (44.1/km2). The racial makeup of the city was 98.63% White, 0.02% African American, 0.22% Native American, 0.41% Asian, 0.09% from other races, and 0.63% from two or more races. Hispanic or Latino of any race were 0.61% of the population. 31.8% were of German, 14.0% Norwegian, 11.3% Swedish, 6.4% Irish and 5.0% English ancestry.