| Saint-Tugdual | |
| Native Name: | Sant-Tudal |
| Commune Status: | Commune |
| Coordinates: | 48.0997°N -3.3372°W |
| Insee: | 56238 |
| Postal Code: | 56540 |
| Arrondissement: | Pontivy |
| Canton: | Gourin |
| Mayor: | Raymond Siou[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Roi Morvan Communauté |
| Elevation Min M: | 140 |
| Elevation Max M: | 276 |
| Area Km2: | 19.97 |
Saint-Tugdual (in French pronounced as /sɛ̃ tyɡdɥal/;) is a commune in the Morbihan department of Brittany in north-western France.[2] Inhabitants of Saint-Tugdual are called in French Tugdualais.
Historically, the village belongs to Vannetais and Pays Pourlet.