Big Timber
- County:
- Sweet Grass County
- County Seat:
- Yes
- Area (mi²):
- 0.977
- State:
- Montana
Big Timber is a city located in Sweet Grass County, Montana. Big Timber has a 2026 population of 1,681. It is also the county seat of Sweet Grass County. Big Timber is currently growing at a rate of 0.24% annually and its population has increased by 2.63% since the most recent census, which recorded a population of 1,638 in 2020.