| Grand Morin | |
|---|---|
| Origin | Champagne |
| Mouth | Marne |
| Basin countries | France |
| Length | 118 km |
| Basin area | 1,180 km² |
The Grand Morin is a 118 km long river in France, left tributary of the Marne. Its source is near the village of Lachy. Its course crosses the departments of Marne and Seine-et-Marne. It flows westwards through the towns of Esternay, La Ferté-Gaucher, Coulommiers and Crécy-la-Chapelle, finally flowing into the Marne in Esbly.
Its main tributary is the Aubetin.