Sullivan County, New Hampshire ZIP codes
17 ZIP codes are in Sullivan County, plus 4 that cross in from neighboring counties. It's part of the Lebanon-Claremont, NH-VT micro area.
- ZIP codes
- 17
- Population in these ZIPs
- 42,802
- Avg. median income
- $79,000population-weighted
- Cities & towns
- 17
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Sullivan County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 03280 | Washington | 1,224 | $90,096 | $385,400 |
| 03284 | Springfield | 890 | $113,158 | $482,400 |
| 03601 | Acworth | 382 | $81,250 | $350,300 |
| 03603 | Charlestown | 5,238 | $56,731 | $306,800 |
| 03605 | Lempster | 907 | $86,250 | $322,900 |
| 03607 | South Acworth | 368 | $84,306 | $315,400 |
| 03743 | Claremont | 13,704 | $59,625 | $282,600 |
| 03745 | Cornish | 1,816 | $91,821 | $452,600 |
| 03746 PO Box | Cornish Flat | — | — | — |
| 03751 | Georges Mills | 397 | — | — |
| 03752 | Goshen | 1,042 | $70,417 | $382,200 |
| 03753 | Grantham | 3,509 | $106,285 | $503,200 |
| 03754 PO Box | Guild | — | — | — |
| 03770 | Meriden | 604 | $153,750 | $571,900 |
| 03773 | Newport | 7,681 | $81,232 | $347,600 |
| 03781 | Plainfield | 1,918 | $109,659 | $524,200 |
| 03782 | Sunapee | 3,122 | $110,175 | $687,000 |
ZIP codes partly in Sullivan County
These ZIP codes are mostly in a neighboring county but cover part of Sullivan County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 03244 | Hillsborough | Hillsborough County | 8,156 | $86,375 | $389,000 |
| 03257 | New London | Merrimack County | 4,484 | $107,000 | $691,800 |
| 03602 | Alstead | Cheshire County | 2,381 | $70,455 | $359,500 |
| 03748 | Enfield | Grafton County | 4,563 | $95,089 | $464,900 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Sullivan County
Nearby counties
Frequently asked questions
How many ZIP codes are in Sullivan County, New Hampshire?
17 ZIP codes are mainly in Sullivan County, and 4 more ZIP codes from neighboring areas reach partly into it.
What cities are in Sullivan County?
ZIP codes in Sullivan County use the city names Acworth, Charlestown, Claremont, Cornish, Cornish Flat, Georges Mills, Goshen, Grantham, Guild, Lempster, Meriden and Newport and others.
What metro area is Sullivan County in?
Sullivan County is part of the Lebanon-Claremont, NH-VT micropolitan statistical area.