ZIP CodesZIP codes in Belknap County, New Hampshire
Belknap County, New Hampshire has 19 ZIP codes in this list, from 03218 to 03837. They cover 16 places, among them Tilton, Laconia, Barnstead and Belmont.
Nothing in this county matches.
| ZIP code | Place | Land area (sq mi) | Map point |
|---|---|---|---|
| 03218 | Barnstead | 15.3 | 43.335, -71.289 |
| 03220 | Belmont | 30.3 | 43.451, -71.489 |
| 03225 | Center Barnstead | 27.8 | 43.357, -71.242 |
| 03226 | Center Harbor | 13.7 | 43.711, -71.480 |
| 03237 | Gilmanton | 38.0 | 43.417, -71.412 |
| 03246 | Laconia | 19.9 | 43.573, -71.478 |
| 03247 | Laconia | no area | 43.589, -71.445 |
| 03249 | Gilford | 38.8 | 43.547, -71.407 |
| 03252 | Lochmere | no area | 43.469, -71.537 |
| 03253 | Meredith | 37.5 | 43.631, -71.500 |
| 03256 | New Hampton | 36.8 | 43.618, -71.644 |
| 03269 | Sanbornton | 49.5 | 43.550, -71.600 |
| 03276 | Tilton | 39.3 | 43.460, -71.577 |
| 03289 | Winnisquam | no area | 43.496, -71.520 |
| 03298 | Tilton | no area | 43.525, -71.446 |
| 03299 | Tilton | no area | 43.525, -71.446 |
| 03809 | Alton | 40.1 | 43.463, -71.230 |
| 03810 | Alton Bay | 23.6 | 43.484, -71.249 |
| 03837 | Gilmanton Iron Works | 20.0 | 43.447, -71.299 |
The ZIP code areas of Belknap County add up to about 430 square miles of land (1,115 sq km) as the Census Bureau draws them. The largest is 03269 (Sanbornton), with 49.5 square miles.
Places with more than one code here: Tilton (3 codes), Laconia (2 codes).
Using these codes
- In an address, the ZIP code comes last, after the city and the two-letter state: Barnstead, NH 03218.
- Tap a ZIP code to open it in the look-up, with a copy button for the address line.
- A code can cross a county line, and one town can have several codes. The table shows the main place of each code.
- "No area" means the Census Bureau draws no area for that code. Such codes are usually for post office boxes or a single building.
Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. This site is not connected with the United States Postal Service; for mailing, confirm the address with USPS.