2 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Rollinsville | 1 | 191 | 375 | 0.53% | 135 | 1.41 | CDP |
| Black Hawk | 2 | 128 | 128 | 0% | 42 | 3.06 | City |
Rollinsville is the largest city in Gilpin County, with a population of 191.
Black Hawk is the smallest city in Gilpin County.
There are 2 cities in Gilpin County, Colorado.