There are 7 cities in Sullivan County, New Hampshire.
Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | State | 2024 Population | 2020 Census | Annual Change | Density (mi²) | Area (mi²) |
|---|---|---|---|---|---|---|---|
| Claremont | 1 | New Hampshire | 13,353 | 12,945 | 0.77% | 309 | 43.15 |
| Newport | 2 | New Hampshire | 5,018 | 5,530 | -2.05% | 356 | 14.11 |
| Enfield | 3 | New Hampshire | 2,099 | 2,059 | 0.48% | 814 | 2.58 |
| Hillsborough | 4 | New Hampshire | 1,713 | 1,421 | 4.45% | 880 | 1.95 |
| New London | 5 | New Hampshire | 1,316 | 1,364 | -0.9% | 1,185 | 1.11 |
| Charlestown | 6 | New Hampshire | 935 | 933 | 0.11% | 981 | 0.95 |
| Plainfield | 7 | New Hampshire | 93 | 265 | -31.62% | 161 | 0.58 |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Claremont is the largest city in Sullivan County.
Plainfield is the smallest city in Sullivan County.
There are 7 cities in Sullivan County, New Hampshire.