| Colmont | |
| Map: | Colmont (rivière) OSM.png |
| Mouth Coordinates: | 48.3811°N -0.604°W |
| Subdivision Type1: | Country |
| Length: | 50.4km (31.3miles) |
The Colmont (pronounced as /fr/) is a 50.4km (31.3miles) long river in western France located in the departments of Orne, Manche (Normandy) and Mayenne (Pays de la Loire). It is a tributary of the river Mayenne on the right side, and so is a sub-tributary of the Loire by Mayenne and Maine. It flows into the Mayenne near Saint-Loup-du-Gast. Its longest tributary is the Ourde (11 km). The largest town on the Colmont is Gorron.