| City | County | 2026 Pop. ↓ |
|---|---|---|
| Concord | Merrimack County | 44,621 |
| Claremont | Sullivan County | 12,998 |
| Conway | Carroll County | 10,333 |
| Chester | Rockingham County | 5,343 |
| Charlestown | Sullivan County | 4,926 |
| Candia | Rockingham County | 4,287 |
| Canaan | Grafton County | 3,845 |
| Chesterfield | Cheshire County | 3,705 |
| Campton | Grafton County | 3,440 |
| Chichester | Merrimack County | 2,856 |
| Canterbury | Merrimack County | 2,467 |
| Colebrook | Coos County | 2,115 |
| Cornish | Sullivan County | 1,647 |
| Center Harbor | Belknap County | 1,051 |
| Croydon | Sullivan County | 891 |
| Carroll | Coos County | 843 |
| Columbia | Coos County | 680 |
| Chatham | Carroll County | 356 |
| Clarksville | Coos County | 282 |