23 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Salem | Rockingham County | 31,913 |
| Somersworth | Strafford County | 12,276 |
| Seabrook | Rockingham County | 8,492 |
| Stratham | Rockingham County | 7,763 |
| Swanzey | Cheshire County | 7,515 |
| Sandown | Rockingham County | 6,841 |
| Strafford | Strafford County | 4,347 |
| Sunapee | Sullivan County | 3,471 |
| Sanbornton | Belknap County | 3,039 |
| Sutton | Merrimack County | 2,125 |
| Sandwich | Carroll County | 1,562 |
| Salisbury | Merrimack County | 1,524 |
| Stoddard | Cheshire County | 1,485 |
| Springfield | Sullivan County | 1,326 |
| South Hampton | Rockingham County | 893 |
| Surry | Cheshire County | 875 |
| Stewartstown | Coos County | 767 |
| Sullivan | Cheshire County | 719 |
| Sugar Hill | Grafton County | 691 |
| Stratford | Coos County | 643 |
| Stark | Coos County | 461 |
| Shelburne | Coos County | 362 |
| Sharon | Hillsborough County | 353 |