| Marsac | |
| Commune Status: | Commune |
| Arrondissement: | Guéret |
| Canton: | Le Grand-Bourg |
| Insee: | 23124 |
| Postal Code: | 23210 |
| Mayor: | Daniel Dumas[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Bénévent-Grand-Bourg |
| Coordinates: | 46.0986°N 1.5906°W |
| Elevation Min M: | 348 |
| Elevation Max M: | 470 |
| Area Km2: | 19.67 |
Marsac (in French pronounced as /maʁsak/; Occitan (post 1500);: Marçac) is a commune in the Creuse department in the Nouvelle-Aquitaine region in central France.
An area of lakes, streams and farming comprising the village and several hamlets situated in the valley of the little river Ardour, some 15miles southwest of Guéret at the junction of the D42, D914 and the D57 roads. The commune is served by a TER railway.