Mars Hill is a populated place LOCATED WITHIN the City of Hoover. In turn, the City of Hoover is located within Jefferson County.
Mars Hill is located at latitude 33.352 and longitude -86.844.
Since Mars Hill is located within the City of Hoover, all of the census and demographic data for residents of Mars Hill are included as part of the information reported for City of Hoover in the "Profile" tab above.