| Larnas | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Larnas (Ardèche).svg |
| Arrondissement: | Privas |
| Canton: | Bourg-Saint-Andéol |
| Insee: | 07133 |
| Postal Code: | 07220 |
| Mayor: | Bernard Chazaut[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 44.4492°N 4.6°W |
| Elevation M: | 250 |
| Elevation Min M: | 120 |
| Elevation Max M: | 364 |
| Area Km2: | 13.5 |
Larnas is a commune in the Ardèche department in southern France.