15 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 03743 | Claremont | 13,673 |
| 03773 | Newport | 7,905 |
| 03603 | Charlestown | 5,272 |
| 03753 | Grantham | 3,478 |
| 03782 | Sunapee | 3,104 |
| 03781 | Plainfield | 1,917 |
| 03745 | Cornish | 1,771 |
| 03280 | Washington | 1,188 |
| 03752 | Goshen | 982 |
| 03605 | Lempster | 863 |
| 03284 | Springfield | 854 |
| 03770 | Meriden | 576 |
| 03601 | Acworth | 407 |
| 03751 | Georges Mills | 382 |
| 03607 | South Acworth | 315 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 15 ZCTAs in Sullivan County, New Hampshire (US Census).