| City | County | 2026 Pop. ↓ |
|---|---|---|
| Nashua | Hillsborough County | 92,949 |
| Newmarket | Rockingham County | 9,776 |
| Newport | Sullivan County | 6,432 |
| New Boston | Hillsborough County | 6,336 |
| New Ipswich | Hillsborough County | 5,531 |
| Nottingham | Rockingham County | 5,523 |
| Northfield | Merrimack County | 5,105 |
| Newton | Rockingham County | 4,857 |
| Northwood | Rockingham County | 4,813 |
| North Hampton | Rockingham County | 4,518 |
| New London | Merrimack County | 4,406 |
| New Durham | Strafford County | 2,969 |
| New Hampton | Belknap County | 2,436 |
| Newbury | Merrimack County | 2,337 |
| Northumberland | Coos County | 2,088 |
| Newfields | Rockingham County | 1,772 |
| New Castle | Rockingham County | 996 |
| Newington | Strafford County | 856 |
| Nelson | Cheshire County | 659 |