 Mount Harrington () is a mountain, 2,550 m, standing 4 nautical miles (7 km) northeast of Mount Ruth Gade in the Quarles Range.It was mapped by the Byrd Antarctic Expedition, 1928–30, and by the United States Geological Survey (USGS) from surveys and U.S. Navy air photos, 1960–64.It was named by Advisory Committee on Antarctic Names (US-ACAN) for John R. Harrington, meteorologist with the South Pole Station winter party, 1962.