As of the 2010 United States Census, there were 6,128 people, 2,477 households, and 1,737 families residing in the county. The population density was . There were 2,784 housing units at an average density of . The racial makeup of the county was 98.1% white, 0.4% black or African American, 0.3% Asian, 0.2% American Indian, 0.3% from other races, and 0.7% from two or more races. Those of Hispanic or Latino origin made up 1.1% of the population. In terms of ancestry, 33.5% were German, 12.6% were Irish, 12.2% were American, and 7.3% were English.