As of the 2010 United States Census, there were 49,423 people, 18,467 households, and 13,409 families in the county. The population density was . There were 20,173 housing units at an average density of . The racial makeup of the county was 94.7% white, 1.9% black or African American, 0.9% Asian, 0.2% American Indian, 0.1% Pacific islander, 0.5% from other races, and 1.9% from two or more races. Those of Hispanic or Latino origin made up 1.3% of the population. In terms of ancestry, 39.8% were German, 11.0% were Irish, 9.2% were American, and 7.8% were English.