| Ōno River | |
| Name Other: | Ōno-gawa |
| Pushpin Map: | Japan |
| Subdivision Type1: | Country |
| Subdivision Name1: | Japan |
| Subdivision Type2: | Prefectures |
| Length: | 107km (66miles) |
| River System: | Ōno River |
| Basin Size: | 1465km2 |
| Custom Label: | Dams |
| Custom Data: | Hakusui Dam |
The is a river that originates in Ōita Prefecture, Japan. After running through the southern and central portions of Ōita Prefecture, it runs through the eastern part of Kumamoto Prefecture and the northern part of Miyazaki Prefecture.
The Hakusui Dam, constructed in 1938, is one of twelve dams located on the river.