| Bappagay | |
| Pushpin Map: | Russia Sakha Republic |
| Pushpin Map Caption: | Mouth location in Sakha, Russia |
| Source1 Location: | Lena Plateau |
| Mouth: | Vilyuy |
| Mouth Coordinates: | 64.0181°N 124.0944°W |
| Subdivision Type1: | Country |
| Length: | 307km (191miles) |
| Basin Size: | 4650km2 |
The Bappagay (Russian: Баппагай)[1] is a river of Sakha Republic, Russia, a right tributary of the Vilyuy.[2] It is long, and has a drainage basin of .