| Gjelsvik Mountains | |
| Map: | Antarctica |
| Region: | Queen Maud Land, East Antarctica |
| Country: | Antarctica |
| Country Type: | Continent |
| Parent: | Fimbulheimen |
| Highest: | Risemedet Mountain |
| Elevation Ft: | 8875 |
| Coordinates: | -72.15°N 38°W |
The Gjelsvik Mountains are a group of mountains about 25nmi long, between the Sverdrup Mountains and the Mühlig-Hofmann Mountains in Queen Maud Land, East Antarctica. With its summit at, the massive Risemedet Mountain forms the highest point in these mountains, also marking their eastern end.
The Gjelsvik Mountains were first photographed from the air and roughly plotted by the Third German Antarctic Expedition (1938–39). They were mapped in detail by Norwegian cartographers from surveys and air photos by the Norwegian–British–Swedish Antarctic Expedition (1949–52) and from air photos by the Norwegian expedition (1958–59). They were named for Tore Gjelsvik, Director of the Norwegian Polar Institute.