Square Butte
- County:
- Chouteau County
- County Seat:
- No
- Area (mi²):
- 0.275
- State:
- Montana
Square Butte is a CDP located in Chouteau County, Montana. Square Butte has a 2025 population of 26 . Square Butte is currently growing at a rate of 8.33% annually and its population has increased by 85.71% since the most recent census, which recorded a population of 14 in 2020.
The median age in Square Butte is 68.4 years: 75.3 years for males, and 68.3 years for females. For every 100 females there are 41.2 males.