| Saint-Aignan | |
| Native Name: | Sant-Inan |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Saint-Aignan (Morbihan).svg |
| Coordinates: | 48.1822°N -3.0125°W |
| Insee: | 56203 |
| Postal Code: | 56480 |
| Arrondissement: | Pontivy |
| Canton: | Gourin |
| Mayor: | Eric Le Denmat[1] |
| Term: | 2022 - 2026 |
| Intercommunality: | Pontivy Communauté |
| Elevation Min M: | 67 |
| Elevation Max M: | 275 |
| Area Km2: | 27.33 |
Saint-Aignan (in French pronounced as /sɛ̃.t‿ɛɲɑ̃/; Breton: Sant-Inan) is a commune in the Morbihan department of Brittany in north-western France.[2] Inhabitants of Saint-Aignan are called in French Saintaignanais.