In which county is ZIP code 03057 located?

ZIP 03057 is listed under Hillsborough, NH.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 03057: Mont Vernon, NH

ZIP: 03057

County: Hillsborough

Coordinates: 42.89760, -71.67620

ZIP Type: Standard

Time Zone: Eastern Time (ET)

Explore detailed information for ZIP code 03057 in Mont Vernon, NH. We include verified county details for Hillsborough plus key geographic references used for mapping and logistics.

Primary City	Mont Vernon
ZIP Code	03057
County	Hillsborough
State	NH
Latitude / Longitude	42.89760, -71.67620
ZIP Type	Standard
Time Zone	Eastern Time (ET)
Data Updated	2026-01-08

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 03057 (not an exact boundary).

Geographic & Administrative Context

For mapping and verification, 03057 is commonly represented around 42.89760, -71.67620. These coordinates help identify the general area within Hillsborough, NH.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 03057 for mail delivery and general location reference in Hillsborough, NH.

This ZIP may extend beyond the city core into nearby communities within Hillsborough.

Related ZIP Codes (Nearby)

Explore other postal codes near Mont Vernon within NH.

Frequently Asked Questions

What is the primary city for ZIP code 03057?

The primary city for this ZIP code is Mont Vernon, located in NH.

In which county is 03057 located?

ZIP code 03057 is situated within Hillsborough, NH.

What are the coordinates for 03057?

The approximate center point is 42.89760 (Latitude) and -71.67620 (Longitude).

Is ZIP code 03057 active?

This page lists ZIP 03057 as Listed based on the latest refresh date shown above.

Does ZIP 03057 cover multiple areas?

Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.

Methodology & Data Notes

How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.

Page updated: 2026-01-08