| Mount Mekunnai | |
| Other Name: | 目国内岳 |
| Elevation M: | 1220 |
| Prominence M: | 673 |
| Parent Peak: | Niseko Annupuri |
| Listing: | List of mountains and hills of Japan by height |
| Location: | Hokkaidō, Japan |
| Range: | Mount Raiden Volcanic Group |
| Coordinates: | 42.9036°N 140.4694°W |
| Topo: | Geographical Survey Institute 25000:1 チセヌプリ 50000:1 岩内 |
| Type: | pyroclastic cone |
| Age: | Quaternary |
| Volcanic Arc/Belt: | Northeastern Japan Arc |
is an andesitic volcano[1] in the Mount Raiden Volcanic Group on the border between Iwanai and Rankoshi, Hokkaidō, Japan. Mount Mekunnai is a pyroclastic cone.[2] The mountain consists of primarily non-alkali, mafic, volcanic rock. The rock is younger than that of neighboring Mount Raiden, being categorized at 700,000 to 13,000 years old. The rock is older than that of the Niseko Volcanic Group.[3]