As of the 2010 United States Census, there were 24,629 people, 9,928 households, and 7,014 families in the county. The population density was 49.1/sqmi (18.9/km2). There were 11,070 housing units at an average density of 22.1/sqmi (8.51/km2). The racial makeup of the county was 98.5% white, 0.5% black or African American, 0.1% Asian, 0.1% American Indian, 0.2% from other races, and 0.6% from two or more races. Those of Hispanic or Latino origin made up 0.4% of the population. In terms of ancestry, 15.4% were German, 13.3% were American, 12.9% were Irish, and 8.3% were English.