| Obsha River | |
|---|---|
| Origin | Smolensk Highland |
| Mouth | Mezha River |
| Basin countries | Russia |
| Length | 153 km |
| Avg. discharge | 11.5 m³/s |
| Basin area | 2,080 km² |
Obsha (Russian: Обша) is a river in Smolensk and Tver Oblasts, Russia, a tributary of the Mezha (Western Dvina basin). The town of Bely is located on the Obsha.