As of the 2010 United States Census, there were 29,718 people, 11,956 households, and 8,175 families residing in the county. The population density was . There were 13,452 housing units at an average density of . The racial makeup of the county was 94.7% white, 0.8% black or African American, 0.3% Asian, 0.2% American Indian, 2.6% from other races, and 1.3% from two or more races. Those of Hispanic or Latino origin made up 5.3% of the population. In terms of ancestry, 36.5% were German, 14.1% were Irish, 12.2% were American, and 10.1% were English.