ZIP Code 03857
Newmarket · Rockingham, New Hampshire
03857 is the ZIP code of Newmarket in Rockingham, New Hampshire, United States.
- ZIP Code
- 03857
- County
- Rockingham
- State
- New Hampshire
- Country
- United States
Place with ZIP code 03857
| Place | County | Location |
|---|---|---|
| Newmarket | Rockingham | 43.073, -70.955 |
Near Boston
The nearest major city is Boston, about 80 km away.
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 03857?
Newmarket.
Which county and state is 03857 in?
Rockingham, New Hampshire, United States.
What is the nearest major city to 03857?
Boston, about 80 km away.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.