| Montbrun | |
| Arrondissement: | Florac |
| Canton: | La Canourgue |
| Commune: | Gorges du Tarn Causses |
| Insee: | 48101 |
| Postal Code: | 48210 |
| Coordinates: | 44.3381°N 3.5044°W |
| Elevation M: | 550 |
| Elevation Min M: | 479 |
| Elevation Max M: | 1105 |
| Area Km2: | 29.97 |
| Population: | 80 |
| Population Date: | 2019 |
| Population Footnotes: | [1] |
Montbrun (in French pronounced as /mɔ̃bʁœ̃/; Montbrun in Occitan) is a former commune in the Lozère departement in southern France. On 1 January 2017, it was merged into the new commune Gorges du Tarn Causses.[2] Its population was 80 in 2019.[1]