Ismay
- County:
- Custer County
- County Seat:
- No
- Area (mi²):
- 0.42
- State:
- Montana
Ismay is a town located in Custer County, Montana. Ismay has a 2026 population of 21. Ismay is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 21 in 2020.