Catalina Foothills is an upscale, high-income census-designated place (CDP) located north of Tucson in Pima County, Arizona, United States. Situated in the southern foothills of the Santa Catalina Mountains, Catalina Foothills had a population of 50,796 at the 2010 census. Catalina Foothills is one of the most affluent communities in Arizona and the U.S., with the 6th highest per capita income in Arizona, and the 14th highest per capita income in the U.S.