As of the 2010 United States Census, there were 66,357 people, 27,421 households, and 17,999 families residing in the county. The population density was . There were 30,359 housing units at an average density of . The racial makeup of the county was 92.7% white, 3.8% black or African American, 0.8% Asian, 0.4% American Indian, 0.5% from other races, and 1.7% from two or more races. Those of Hispanic or Latino origin made up 2.0% of the population. In terms of ancestry, 23.6% were German, 17.3% were Irish, 16.0% were English, 9.0% were American, and 6.1% were Italian.