1 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Columbus | 1 | 2,015 | 1,867 | 1.26% | 1,468 | 1 | Town |
Columbus is the largest city in Stillwater County, with a population of 2,015.
Columbus is the smallest city in Stillwater County, with a population of 2,015.
There is 1 city in Stillwater County, Montana.