| Blanzay-sur-Boutonne | |
| Commune Status: | Commune |
| Arrondissement: | Saint-Jean-d'Angély |
| Canton: | Matha |
| Insee: | 17049 |
| Postal Code: | 17470 |
| Mayor: | Jean-Luc Duguy[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Vals de Saintonge |
| Coordinates: | 46.0506°N -0.4283°W |
| Elevation Min M: | 26 |
| Elevation Max M: | 57 |
| Area Km2: | 5.75 |
Blanzay-sur-Boutonne (in French pronounced as /blɑ̃zɛ syʁ butɔn/, literally Blanzay on Boutonne) is a commune in the Charente-Maritime department in the Nouvelle-Aquitaine region in southwestern France.
The Boutonne forms the commune's northwestern and western borders.