| Adabay | |
| Pushpin Map: | Ethiopia |
| Subdivision Type1: | Country |
| Subdivision Type2: | Region |
| Subdivision Name2: | Amhara Region |
| Subdivision Type3: | Districts (woreda) |
| Source1 Coordinates: | 10.0167°N 42°W |
| Source1 Elevation: | 1905m (6,250feet) |
| River System: | Permanent river |
| Tributaries Left: | Beresa |
| Tributaries Right: | Chacha |
| Custom Label: | Topography |
| Custom Data: | Mountains and deep gorges |
Adabay River is a river of central Ethiopia which, along with the Wanchet River, defined the former district of Marra Biete.[1] Its tributaries include the Chacha, the Beresa, and three other streams which join together at the top of a deep canyon.[2] [3]