| Ramena River | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Madagascar |
| Subdivision Type3: | Region |
| Subdivision Name3: | Diana |
| Length: | 86.2km (53.6miles) |
| Source1: | at the Maromokotra peak |
| Source1 Location: | Tsaratanana Massif, Diana |
| Source1 Elevation: | 2500m (8,200feet) |
| Mouth: | Ambodimanga, Sambirano River |
| Mouth Location: | Diana |
| Mouth Coordinates: | -13.7333°N 85°W |
| Mouth Elevation: | 27m (89feet) |
| Basin Size: | 1080km2 |
The Ramena River is a river of northwestern Madagascar in the region of Diana. It has its sources at the Maromokotra and is the main affluent of the Sambirano River.[1] Its outlet is situated at Ambodimanga Ramena.