| Shacha | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Length: | 113km (70miles) |
| Mouth: | Kostroma |
| Mouth Coordinates: | 58.2782°N 41.0369°W |
| Basin Size: | 865km2 |
The Shacha (Russian: Шача) is a river in Kostroma Oblast, Russia. It is a left tributary of the Kostroma River. It is long, and has a drainage basin of .