Group Quarters as a Share of the Population, 2010
In most counties, the group quarters population accounts for less than 3 percent of the total population; the share in Arizona in 2010 was 2.2 percent, a little less than the U.S. average of 2.6 percent. In a few counties, however, the group quarters share is appreciably larger. In Graham and Pinal counties, the larger share primarily results from a large prison population. In Coconino County, most of those living in group quarters are in dormitories at Northern Arizona University. In Cochise County, a prison and the military barracks at Fort Huachuca account for the relatively large group quarters share.