| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Circle | 1 | 588 | 593 | -0.34% | 754 | 1 | Town |
Circle is the largest city in McCone County, with a population of 588.
Circle is the smallest city in McCone County, with a population of 588.
There is 1 city in McCone County, Montana.