The Mayer Crags (84°53′S168°45′W) form a rugged V-shaped massif in Antarctica. The feature is 10 nautical miles (19 km) long, surmounted by several sharp peaks, and located at the west side of the mouth of Liv Glacier, where the latter enters the Ross Ice Shelf. It was named by the Advisory Committee on Antarctic Names for Lieutenant Robert V. Mayer, U.S.