| Mount Gaston de Gerlache | |
| Elevation M: | 2400 |
| Location: | Queen Fabiola Mountains, Antarctica |
| Map: | Antarctica |
| Map Size: | 260 |
| Label Position: | bottom |
| Coordinates: | -71.7333°N 84°W |
Mount Gaston de Gerlache is the southernmost massif, high, in the Queen Fabiola Mountains of Antarctica. It was discovered on 7 October 1960 by the Belgian Antarctic Expedition, 1960, under Guido Derom, and was named by Derom for Gaston de Gerlache, son of Adrien de Gerlache (leader of the first Belgian Antarctic Expedition, 1897–99). Gaston led the Belgian Antarctic Expedition, 1957–58, which landed on Princess Ragnhild Coast and built the Roi Baudouin Station to carry out the scientific program of the International Geophysical Year.