| Mount Onnebetsu | |
| Other Name: | 遠音別岳 |
| Elevation M: | 1330.4 |
| Elevation Ref: | [1] |
| Map: | Japan |
| Label Position: | left |
| Listing: | List of mountains and hills of Japan by height |
| Location: | Hokkaido, Japan |
| Range: | Shiretoko Peninsula |
| Coordinates: | 43.9933°N 145.0133°W |
| Coordinates Ref: | [2] |
| Topo Maker: | Geospatial Information Authority of Japan 25000:1 遠音別岳 25000:1 真鯉 50000:1 斜里 50000:1 標津 |
| Type: | Stratovolcano and Lava dome |
| Age: | Quaternary |
| Volcanic Arc/Belt: | Kurile arc |
| Last Eruption: | ca. 0.4–0.2 million years ago |
is a Quaternary stratovolcano.[3] Its summit is 1330.4m (4,364.8feet) above sea level.[1] It is located on Hokkaido's Shiretoko Peninsula on the border of Shari in Shari District, Okhotsk and Rausu in Menashi District, Nemuro.
The mountain is made mainly of andesite.[3]