Mittelberg is a municipality in the district of Bregenz, Vorarlberg, Austria.
Mittelberg may also refer to:
Mittelberg (Rhön), a mountain of Germany Mittelberg (Thuringian Highland), a mountain of Germany
See also Großer Mittelberg (disambiguation), multiple hills and mountains of Germany Oy-Mittelberg, a municipality in Oberallgäu, Bavaria, Germany