As of the 2010 United States Census, there were 7,141 people, 3,057 households, and 2,052 families living in the county. The population density was . There were 5,346 housing units at an average density of . The racial makeup of the county was 98.7% white, 0.2% American Indian, 0.2% black or African American, 0.1% Asian, 0.1% from other races, and 0.6% from two or more races. Those of Hispanic or Latino origin made up 0.6% of the population. In terms of ancestry, 30.3% were German, 15.7% were Irish, 8.1% were American, 7.9% were English, and 5.8% were Dutch.