| Saint-Viaud | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Saint-Viaud (Loire-Atlantique).svg |
| Arrondissement: | Saint-Nazaire |
| Canton: | Saint-Brevin-les-Pins |
| Insee: | 44192 |
| Postal Code: | 44320 |
| Mayor: | Roch Chéraud[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Sud-Estuaire |
| Coordinates: | 47.2561°N -2.0183°W |
| Elevation M: | 30 |
| Elevation Min M: | 0 |
| Elevation Max M: | 51 |
| Area Km2: | 32.63 |
Saint-Viaud (in French pronounced as /sɛ̃ vjo/; Breton: Sant-Widel-Skovrid) is a commune in the Loire-Atlantique department in western France.[2]