3 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| White Sulphur Springs | 1 | 1,071 | 948 | 2.39% | 1,082 | 0.99 | City |
| Martinsdale | 2 | 46 | 42 | 6.98% | 53 | 0.87 | CDP |
| Martinsdale Colony | 3 | 27 | 124 | 3.85% | 12 | 2.22 | CDP |
White Sulphur Springs is the largest city in Meagher County, with a population of 1,071.
Martinsdale Colony is the smallest city in Meagher County.
There are 3 cities in Meagher County, Montana.