As of the 2010 United States Census, there were 43,742 people, 18,126 households, and 12,025 families living in the county. The population density was . There were 22,341 housing units at an average density of . The racial makeup of the county was 97.0% white, 0.6% Asian, 0.4% black or African American, 0.3% American Indian, 0.3% from other races, and 1.4% from two or more races. Those of Hispanic or Latino origin made up 1.1% of the population. In terms of ancestry, 23.9% were English, 16.3% were Irish, 9.2% were German, 7.1% were Italian, 6.0% were French Canadian, 5.2% were Scottish, 5.1% were Polish, and 4.4% were American.