As of the 2010 census, there were 695 people, 349 households, and 213 families living in the county. The population density was . There were 526 housing units at an average density of . The racial makeup of the county was 86.9% white, 1.2% American Indian, 0.3% black or African American, 10.2% from other races, and 1.4% from two or more races. Those of Hispanic or Latino origin made up 43.0% of the population. In terms of ancestry, 11.0% were German, and 2.2% were American.