| Saint-Thomas-en-Royans | |
| Commune Status: | Commune |
| Arrondissement: | Die |
| Canton: | Vercors-Monts du Matin |
| Insee: | 26331 |
| Postal Code: | 26190 |
| Mayor: | Valéry Friol[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 45.05°N 5.29°W |
| Elevation M: | 210 |
| Elevation Min M: | 164 |
| Elevation Max M: | 390 |
| Area Km2: | 5.15 |
Saint-Thomas-en-Royans (in French pronounced as /sɛ̃ tɔma ɑ̃ ʁwajɑ̃/; Vivaro-Alpine: Sant Tomàs de Roians) is a commune in the Drôme department in southeastern France.