| Diudiu River | |
| River | |
| Countries | Romania |
|---|---|
| Counties | Alba County |
| Tributaries | |
| - right | Costişa |
| Source | |
| - location | Şureanu Mountains, Mount Vârfu lui Petru |
| - elevation | 1,946 m (6,385 ft) |
| - coordinates | |
| Mouth | Sebeş |
| - location | Lake Oaşa |
| - elevation | 1,268 m (4,160 ft) |
| - coordinates | |
The Diudiu River is a tributary of the Sebeş River in Romania.