Rancho Santa Fe is a populated place LOCATED WITHIN the City of Phoenix. In turn, the City of Phoenix is located within Maricopa County.
Rancho Santa Fe is located at latitude 33.637 and longitude -111.993.
Since Rancho Santa Fe is located within the City of Phoenix, all of the census and demographic data for residents of Rancho Santa Fe are included as part of the information reported for City of Phoenix in the "Profile" tab above.