Big Sandy
- County:
- Chouteau County
- County Seat:
- No
- Area (mi²):
- 0.477
- State:
- Montana
Big Sandy is a town located in Chouteau County, Montana. Big Sandy has a 2026 population of 604. Big Sandy is currently declining at a rate of -0.49% annually and its population has decreased by -3.05% since the most recent census, which recorded a population of 623 in 2020.