| Monsac | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Monsac (Dordogne).svg |
| Arrondissement: | Bergerac |
| Canton: | Lalinde |
| Insee: | 24281 |
| Postal Code: | 24440 |
| Mayor: | Daniel Ségala[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 44.7797°N 0.6975°W |
| Elevation M: | 90 |
| Elevation Min M: | 63 |
| Elevation Max M: | 172 |
| Area Km2: | 10.74 |
Monsac (pronounced as /fr/) is a commune in the Dordogne department in Nouvelle-Aquitaine in southwestern France.