As of the 2010 United States Census, there were 7,356 people, 3,089 households, and 2,076 families in the county. The population density was . There were 3,526 housing units at an average density of . The racial makeup of the county was 97.1% white, 0.5% American Indian, 0.3% Asian, 0.1% black or African American, 1.1% from other races, and 0.8% from two or more races. Those of Hispanic or Latino origin made up 2.3% of the population. In terms of ancestry, 49.9% were German, 16.8% were Norwegian, 8.9% were Irish, 6.7% were Swedish, 5.6% were English, and 5.2% were American.