| Locality | Post Code |
|---|---|
| Acworth, Sullivan | 03601 |
| Charlestown, Sullivan | 03603 |
| Claremont, Sullivan | 03743 |
| Cornish, Sullivan | 03745 |
| Cornish Flat, Sullivan | 03746 |
| Croydon, Sullivan | 03773 |
| East Lempster, Sullivan | 03605 |
| Georges Mills, Sullivan | 03751 |
| Goshen, Sullivan | 03752 |
| Grantham, Sullivan | 03753 |
| Guild, Sullivan | 03754 |
| Langdon, Sullivan | 03602 |
| Lempster, Sullivan | 03605 |
| Meriden, Sullivan | 03770 |
| Newport, Sullivan | 03773 |
| Plainfield, Sullivan | 03781 |
| South Acworth, Sullivan | 03607 |
| Springfield, Sullivan | 03284 |
| Sunapee, Sullivan | 03782 |
| Unity, Sullivan | 03603, 03743, 03773 |
| Washington, Sullivan | 03280 |
| West Springfield, Sullivan | 03284 |
| New Hampshire Postal Codes | |
|---|---|
| Sullivan | Strafford |
| Rockingham | Merrimack |
| Hillsborough | Grafton |
| Coos | Cheshire |
| Carroll | Belknap |