Newmarket zip code
Zip code in Newmarket, NH
The location Newmarket belongs to Rockingham County, state of New Hampshire. Newmarket has been assigned with the zip code 03857.
Newmarket is the official name of the location so if you want to use the US Postal Service you must use that name.
| Zip code | Type | Population |
|---|---|---|
| 03857 | STANDARD | 8,420 |
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