| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Philipsburg | 1 | 946 | 839 | 2.16% | 1,113 | 1 | Town |
| Drummond | 2 | 304 | 270 | 2.01% | 561 | 1 | Town |
Philipsburg is the largest city in Granite County, with a population of 946.
Drummond is the smallest city in Granite County, with a population of 304.
There are 2 cities in Granite County, Montana.