| Saint-Julien-du-Serre | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Saint-Julien-du-Serre (Ardèche).svg |
| Arrondissement: | Largentière |
| Canton: | Aubenas-1 |
| Insee: | 07254 |
| Postal Code: | 07200 |
| Mayor: | Jean-Luc Arnaud[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 44.6578°N 4.4119°W |
| Elevation M: | 350 |
| Elevation Min M: | 224 |
| Elevation Max M: | 482 |
| Area Km2: | 9.78 |
Saint-Julien-du-Serre (pronounced as /fr/; oc|Sant Julian delh Sèrre) is a commune in the Ardèche department in southern France.