Rincon Valley is a census-designated place in the Rincon Valley, in Pima County, Arizona, United States. The population was 5,139 at the 2010 census. The racial and ethnic composition of the population was 79.9% non-Hispanic white, 1.5% black or African American, 0.3% Native American, 1.6% Asian, 0.1% non-Hispanic from some other race, 2.5% two or more races and 15.0% Hispanic or Latino.