| Marsilly | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Marsilly 17.svg |
| Arrondissement: | La Rochelle |
| Canton: | Lagord |
| Insee: | 17222 |
| Postal Code: | 17137 |
| Mayor: | Hervé Pineau[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA La Rochelle |
| Coordinates: | 46.2314°N -1.1367°W |
| Elevation Min M: | 0 |
| Elevation Max M: | 31 |
| Area Km2: | 11.91 |
Marsilly (in French pronounced as /maʁsiji/) is a commune in the Charente-Maritime department in southwestern France.
Between 1932 and 1936, the well-known writer Georges Simenon and his wife Régine lived at La Richardière, a 16th-century manor house in Marsilly. The house is evoked in Simenon's novel Le Testament Donadieu