Mount Harry is a mountain 14 nautical miles (26 km) southeast of the FitzGerald Bluffs, Ellsworth Land, Antarctica. It is western-most in a chain of small summits lying south-eastward of the bluffs. The feature lies within a group of nunataks photographed by Lincoln Ellsworth on November 23, 1935. It was mapped by the United States Geological Survey (USGS) from surveys and U.S. Navy aerial photographs from 1961–66, and was named by the Advisory Committee on Antarctic Names for Jack L.