Mason Valley is a populated place LOCATED WITHIN the Town of Highfill. In turn, the Town of Highfill is located within Benton County.
Mason Valley is located at latitude 36.299 and longitude -94.341.
Since Mason Valley is located within the Town of Highfill, all of the census and demographic data for residents of Mason Valley are included as part of the information reported for Town of Highfill in the "Profile" tab above.