| Demon/Mount Kamuidake | |
| Elevation M: | 1,205 |
| Location: | Iturup, Kuril Islands |
| Coordinates: | 45.5°N 148.85°W |
| Map: | Russia Far Eastern Federal District |
| Type: | Stratovolcano |
| Last Eruption: | Unknown |
Demon (Russian: Демон; ; Japanese: 神威岳|translit=Kamui-dake) is a stratovolcano located at the northern end of Iturup Island, in the Kuril Archipelago.
The Ilya Muromets Waterfall (Rakkibetsu Waterfall) falls abruptly from the eastern slope of the volcano into the Pacific Ocean.