Mount Horne () is a highest (1,165 m) and most prominent mountain in the Quilty Nunataks, standing 12 nautical miles (22 km) east-northeast of Mount Hassage in Palmer Land. Discovered by the Ronne Antarctic Research Expedition (RARE), 1947–48, under Ronne, who named it for Bernard Horne of Pittsburgh, PA, who furnished wind-proofs and other clothing for the expedition.
This article incorporates public domain material from the United States Geological Survey document "Mount Horne" (content from the Geographic Names Information System).