As of the 2010 United States Census, there were 68,756 people, 26,497 households, and 18,898 families living in the county. The population density was . There were 30,100 housing units at an average density of . The racial makeup of the county was 93.0% white, 4.1% black or African American, 0.4% Asian, 0.3% American Indian, 0.6% from other races, and 1.6% from two or more races. Those of Hispanic or Latino origin made up 1.6% of the population. In terms of ancestry, 25.9% were American, 15.3% were Irish, 11.2% were English, and 9.3% were German.