Mayfair is a populated place LOCATED WITHIN the City of Dover. In turn, the City of Dover is located within Kent County.
Mayfair is located at latitude 39.133 and longitude -75.537.
Since Mayfair is located within the City of Dover, all of the census and demographic data for residents of Mayfair are included as part of the information reported for City of Dover in the "Profile" tab above.