| Ansac-sur-Vienne | |
| Commune Status: | Commune |
| Arrondissement: | Confolens |
| Canton: | Charente-Vienne |
| Insee: | 16016 |
| Postal Code: | 16500 |
| Mayor: | Fabrice Audoin[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 45.9939°N 0.6478°W |
| Elevation M: | 110 |
| Elevation Min M: | 130 |
| Elevation Max M: | 231 |
| Area Km2: | 30.79 |
Ansac-sur-Vienne (in French pronounced as /ɑ̃sak syʁ vjɛn/, literally Ansac on Vienne; Occitan (post 1500);: Ançac) is a commune in the Charente department in Southwestern France.