2010 census As of the 2010 United States Census, there were 42,698 people, 16,188 households, and 11,942 families living in the county. The population density was . There were 17,407 housing units at an average density of . The racial makeup of the county was 94.9% white, 0.4% black or African American, 0.4% Asian, 0.3% American Indian, 2.4% from other races, and 1.5% from two or more races. Those of Hispanic or Latino origin made up 7.8% of the population. In terms of ancestry, 45.5% were German, 11.9% were Irish, 10.7% were English, 6.9% were Polish, and 6.2% were American.
2010 census As of the 2010 United States Census there were 42698 people 16188 households and 11942 families living in the county The population density was  There were 17407 housing units at an average density of  The racial makeup of the county was 949% white 04% black or African American 04% Asian 03% American Indian 24% from other races and 15% from two or more races Those of Hispanic or Latino origin made up 78% of the population In terms of ancestry 455% were German 119% were Irish 107% were English 69% were Polish and 62% were American