| Marcilly | |
| Commune Status: | Commune |
| Coordinates: | 49.0378°N 2.8783°W |
| Insee: | 77274 |
| Postal Code: | 77139 |
| Arrondissement: | Meaux |
| Canton: | La Ferté-sous-Jouarre |
| Mayor: | Dominique Duchesne[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Pays de l'Ourcq |
| Elevation Min M: | 72 |
| Elevation Max M: | 126 |
| Area Km2: | 6.93 |
Marcilly (in French pronounced as /maʁsiji/) is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France.
Inhabitants are called Marcilliens.