High Quality Content by WIKIPEDIA articles! Catalina Foothills is a 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. of communities with a population of at least 50,000. The Catalina Foothills community includes some of the Tucson metropolitan area`s most expensive homes and land, and has the highest median property value.