Hillside Colony
- County:
- Toole County
- County Seat:
- No
- Area (mi²):
- 0.334
- State:
- Montana
Hillside Colony is a CDP located in Toole County, Montana. Hillside Colony has a 2025 population of 324. Hillside Colony is currently growing at a rate of 7.28% annually and its population has increased by 55.02% since the most recent census, which recorded a population of 209 in 2020.
The median age in Hillside Colony is 14.9 years: 18.8 years for males, and 9.8 years for females.