New Hampshire ZIP codes
New Hampshire holds 281 ZIP codes between 03031 and 03897. The tables rank the places and counties with the most codes; the guide below decodes the numbering.
Places with the most ZIP codes in New Hampshire
| Place | ZIP codes |
|---|---|
| Manchester | 8 |
| Nashua | 5 |
| Concord | 4 |
| Portsmouth | 4 |
| Rochester | 4 |
| Tilton | 3 |
| Dover | 3 |
| Laconia | 2 |
| Keene | 2 |
| Lebanon | 2 |
| Hampton | 2 |
| Barnstead | 1 |
| Belmont | 1 |
| Center Barnstead | 1 |
| Center Harbor | 1 |
| Gilmanton | 1 |
| Gilford | 1 |
| Lochmere | 1 |
| Meredith | 1 |
| New Hampton | 1 |
New Hampshire counties by ZIP count
| County | ZIP codes |
|---|---|
| Rockingham | 44 |
| Grafton | 40 |
| Hillsborough | 39 |
| Carroll | 31 |
| Merrimack | 29 |
| Cheshire | 27 |
| Belknap | 19 |
| Strafford | 19 |
| Sullivan | 17 |
| Coos | 16 |
Reading a New Hampshire ZIP code
New Hampshire holds 281 ZIP codes between 03031 and 03897, spread over 10 counties. Manchester leads the state with 8 codes, ahead of Nashua with 5. Every code here opens with the digit 0: that opening number is the national postal region New Hampshire belongs to, the next two digits name the sectional center that sorts the mail, and the final two point to the local office. A ZIP+4 suffix narrows delivery to a block face. Boundaries follow carrier routes rather than city limits, which is why Manchester spreads across 8 codes while some rural codes cross county lines.
Source: GeoNames postal dataset (CC BY 4.0), snapshot of 2026-07-09. Counts cover standard delivery ZIPs listed for New Hampshire; unique and PO box codes may add to these totals.
Last updated: · Methodology and sources