23 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Salem | Rockingham County | 33,283 |
| Somersworth | Strafford County | 12,286 |
| Seabrook | Rockingham County | 8,355 |
| Stratham | Rockingham County | 7,672 |
| Swanzey | Cheshire County | 7,432 |
| Sandown | Rockingham County | 6,722 |
| Strafford | Strafford County | 4,359 |
| Sunapee | Sullivan County | 3,468 |
| Sanbornton | Belknap County | 3,080 |
| Sutton | Merrimack County | 2,057 |
| Sandwich | Carroll County | 1,552 |
| Salisbury | Merrimack County | 1,523 |
| Stoddard | Cheshire County | 1,461 |
| Springfield | Sullivan County | 1,335 |
| South Hampton | Rockingham County | 890 |
| Surry | Cheshire County | 856 |
| Stewartstown | Coos County | 765 |
| Sugar Hill | Grafton County | 702 |
| Sullivan | Cheshire County | 702 |
| Stratford | Coos County | 649 |
| Stark | Coos County | 460 |
| Shelburne | Coos County | 354 |
| Sharon | Hillsborough County | 348 |