| Marcillac-Saint-Quentin | |
| Commune Status: | Commune |
| Arrondissement: | Sarlat-la-Canéda |
| Canton: | Sarlat-la-Canéda |
| Insee: | 24252 |
| Postal Code: | 24200 |
| Mayor: | Michel André[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 44.9514°N 1.2139°W |
| Elevation M: | 231 |
| Elevation Min M: | 121 |
| Elevation Max M: | 327 |
| Area Km2: | 16.46 |
Marcillac-Saint-Quentin (pronounced as /fr/; Languedocien: Marcilhac e Sent Quentin) is a commune in the Dordogne department in Nouvelle-Aquitaine in southwestern France.