Home / New Hampshire ZIP Codes / ZIP Code 03307

ZIP code 03307 belongs to Loudon, New Hampshire, in Merrimack. If you are mailing a letter or package to this area, use Loudon, NH 03307 in the address. On this page you will find the city and county for 03307, nearby ZIP codes in the same county, and free tools to look up any address in this ZIP code.

What City Is ZIP Code 03307?

The city for ZIP code 03307 is Loudon, New Hampshire. When you write an address in this area, the correct format is: Name, Street Address, Loudon, NH 03307.

ZIP Code 03307 County and State

ZIP code 03307 is located in Merrimack, New Hampshire. For a complete list of cities and ZIP codes across the state, see the New Hampshire ZIP Codes page.

Nearby ZIP Codes in Merrimack

These ZIP codes are in the same county as 03307:

ZIP Code 03307 on the Map

The map below shows the approximate center of ZIP code 03307, near Loudon, New Hampshire. You can zoom in and drag the map to explore the area.

Map center is approximate (ZIP area center, around 43.3193, -71.467). Map data © OpenStreetMap.

Population and Demographics of ZIP Code 03307

According to public U.S. Census Bureau data, ZIP code 03307 is home to a community in New Hampshire. The figures below come from the U.S. Census and the American Community Survey (ACS).

Source: U.S. Census Bureau, American Community Survey (ACS) 2023 5-year estimates and 2023 Gazetteer. Figures are estimates and change with each new survey.

Find an Address in ZIP Code 03307

Need the full ZIP+4 code for a specific street address in Loudon? Use the free ZIP+4 Lookup tool, or find any ZIP code from a street address with the ZIP Code by Address tool.

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