As of the 2010 United States Census, there were 13,815 people, 5,697 households, and 3,790 families in the county. The population density was . There were 6,404 housing units at an average density of . The racial makeup of the county was 97.7% white, 0.5% Asian, 0.3% black or African American, 0.2% American Indian, 0.5% from other races, and 0.8% from two or more races. Those of Hispanic or Latino origin made up 1.1% of the population. In terms of ancestry, 21.7% were German, 14.6% were American, 12.6% were Irish, and 8.6% were English.