As of the 2010 United States Census, there were 5,903 people, 2,108 households, and 1,483 families in the county. The population density was . There were 2,760 housing units at an average density of . The racial makeup of the county was 96.7% white, 0.3% American Indian, 0.2% black or African American, 0.2% Asian, 1.8% from other races, and 0.8% from two or more races. Those of Hispanic or Latino origin made up 2.5% of the population. In terms of ancestry, 42.3% were German, 24.0% were Norwegian, 7.0% were English, 6.1% were Irish, 5.4% were Dutch, and 5.3% were American.