West Yellowstone
- County:
- Gallatin County
- County Seat:
- No
- Area (mi²):
- 0.908
- State:
- Montana
West Yellowstone is a town located in Gallatin County, Montana. West Yellowstone has a 2026 population of 1,202. West Yellowstone is currently declining at a rate of -1.72% annually and its population has decreased by -5.87% since the most recent census, which recorded a population of 1,277 in 2020.