In which county is ZIP code 03307 located?

ZIP 03307 is listed under Merrimack County, NH.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 03307: Loudon, NH

ZIP: 03307

County: Merrimack County

Coordinates: 43.31930, -71.46700

ZIP Type: Standard

Time Zone: Eastern Time (ET)

Explore detailed information for ZIP code 03307 in Loudon, NH. We include verified county details for Merrimack County plus key geographic references used for mapping and logistics.

Primary City	Loudon
ZIP Code	03307
County	Merrimack County
State	NH
Latitude / Longitude	43.31930, -71.46700
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 03307 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 03307 are listed as 43.31930 / -71.46700, useful for GPS and service checks in and around Loudon, NH.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 03307 for mail delivery and general location reference in Merrimack County, NH.

Coverage may include nearby neighborhoods and adjacent unincorporated areas commonly associated with Loudon.

Related ZIP Codes (Nearby)

Explore other postal codes near Loudon within NH.

Frequently Asked Questions

What is the primary city for ZIP code 03307?

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

In which county is 03307 located?

ZIP code 03307 is situated within Merrimack County, NH.

What are the coordinates for 03307?

The approximate center point is 43.31930 (Latitude) and -71.46700 (Longitude).

Is ZIP code 03307 active?

This page lists ZIP 03307 as Listed based on the latest refresh date shown above.

Does ZIP 03307 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