Mount Jackson (Mount Andrew Jackson and Mount Ernest Gruening) is a mountain that dominates the upland of the southern part of the Antarctic Peninsula. It is located in Palmer Land, within the Antarctic claims of Argentina, Chile and the United Kingdom. With an elevation of 3,184 metres (10,446 ft), Mount Jackson is the highest mountain in the Antarctic Peninsula and the British Antarctic Territory. Discovered by members of the United States Antarctic Service, 1939–41, it was named for Andrew Jackson, the seventh President of the United States.