| Oissery | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la ville de Oissery (Seine-et-Marne).svg |
| Coordinates: | 49.0707°N 2.8168°W |
| Insee: | 77344 |
| Postal Code: | 77178 |
| Arrondissement: | Meaux |
| Canton: | Claye-Souilly |
| Mayor: | Jean-Louis Ragon[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Plaines et Monts de France |
| Elevation Min M: | 81 |
| Elevation Max M: | 122 |
| Area Km2: | 15.17 |
Oissery (in French pronounced as /wasʁi/) is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France. It is around 40 km northeast of the centre of Paris.
Inhabitants are called Ostéraciens in French.