Thompson Falls
- County:
- Sanders County
- County Seat:
- Yes
- Area (mi²):
- 1.594
- State:
- Montana
Thompson Falls is a city located in Sanders County, Montana. Thompson Falls has a 2026 population of 1,526. It is also the county seat of Sanders County. Thompson Falls is currently growing at a rate of 1.19% annually and its population has increased by 11.63% since the most recent census, which recorded a population of 1,367 in 2020.