City | Rank | County | 2026 Pop.↓ |
|---|---|---|---|
| Berlin | 1 | Coos County | 9,492 |
| Lancaster | 2 | Coos County | 3,217 |
| Gorham | 3 | Coos County | 2,649 |
| Whitefield | 4 | Coos County | 2,533 |
| Colebrook | 5 | Coos County | 2,115 |
| Northumberland | 6 | Coos County | 2,088 |
| Milan | 7 | Coos County | 1,348 |
| Jefferson | 8 | Coos County | 1,065 |
| Dalton | 9 | Coos County | 902 |
| Pittsburg | 10 | Coos County | 852 |
| Carroll | 11 | Coos County | 843 |
| Stewartstown | 12 | Coos County | 770 |
| Columbia | 13 | Coos County | 680 |
| Stratford | 14 | Coos County | 642 |
| Stark | 15 | Coos County | 460 |
| Shelburne | 16 | Coos County | 365 |
| Randolph | 17 | Coos County | 327 |
| Dummer | 18 | Coos County | 314 |
| Errol | 19 | Coos County | 289 |
| Clarksville | 20 | Coos County | 282 |
Coos County is the county generally consideredasNorth CountyNew Hampshire.