The Mohn Basin () is a major depression in the surface near the edge of the Antarctic polar plateau. It extends southward from the western limit of the Quarles Range for about and includes the névé area adjacent to the heads of the Bowman, Devils, Amundsen and Scott glaciers, in the Queen Maud Mountains of Antarctica. The feature was encountered in December 1911 by the South Pole party of the Norwegian expedition under Roald Amundsen, and was named by the Advisory Committee on Antarctic Names for Norwegian meteorologist Henrik Mohn, the author of the meteorological report of this expedition.