Mount Lanning is a mountain, high, located at the south side of Newcomer Glacier, 5nmi southeast of Mount Warren, in the northern portion of the Sentinel Range, Ellsworth Mountains, Antarctica. It forms the north extremity of Sostra Heights, and surmounts Sabazios Glacier to the southwest and Anchialus Glacier to the southeast.
The mountain was first mapped by the United States Geological Survey from surveys and U.S. Navy air photos from 1957 to 1959, and was named by the Advisory Committee on Antarctic Names for 1st Lieutenant Delmar L. Lanning of the United States Air Force who participated in establishing South Pole Station in the 1956–57 season.
