| Dep | |
| Mouth: | Zeya |
| Mouth Coordinates: | 52.8711°N 127.7464°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Length: | 348km (216miles) |
| Basin Size: | 10400km2 |
| Pushpin Map: | Russia Amur Oblast |
| Pushpin Map Caption: | Mouth location in Amur Oblast, Russia |
The Dep is a left tributary of the Zeya (itself a tributary of the Amur) in Amur Oblast, eastern Russia. It is long, and has a drainage basin of .