| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Kupreanof | 1 | 18 | 19 | 0% | 6.0 | 3 | City |
Kupreanof is the largest city in Petersburg Borough, with a population of 18.
Kupreanof is the smallest city in Petersburg Borough, with a population of 18.
There is 1 city in Petersburg Borough, Alaska.