As of the 2010 United States Census, there were 66,501 people, 24,691 households, and 16,837 families living in the county. The population density was . There were 27,834 housing units at an average density of . The racial makeup of the county was 91.1% white, 5.7% black or African American, 0.5% Asian, 0.2% American Indian, 0.1% Pacific islander, 0.8% from other races, and 1.7% from two or more races. Those of Hispanic or Latino origin made up 2.3% of the population. In terms of ancestry, 29.7% were German, 15.2% were Irish, 14.7% were American, and 10.2% were English.