At the 2010 census, there were 5,775 people, 2,213 households, and 1,545 families living in the county. The population density was . There were 2,575 housing units at an average density of . The racial makeup of the county was 84.0% white, 4.2% American Indian, 0.4% Asian, 0.3% black or African American, 8.6% from other races, and 2.5% from two or more races. Those of Hispanic or Latino origin made up 21.1% of the population. In terms of ancestry, 19.4% were German, 13.6% were English, 12.2% were Irish, and 12.0% were American.