Somersworth, NH ZIP Codes, Coordinates & Counties

Somersworth, New Hampshire has 1 ZIP code in Strafford county. The approximate center of Somersworth is 43.253, -70.885. Somersworth has about 30,882 known street addresses.

ZIP codes
1
Counties
1
State
New Hampshire (NH)
Coordinates
43.253, -70.885
Mapped addresses
30,882

ZIP codes in Somersworth, NH

ZIP CodeCountyLatitudeLongitude
03878 Strafford 43.253 -70.885

Counties Somersworth spans

Strafford

Most common streets in Somersworth

High, Sherwood, Green, Maplewood, Main, Government, Canal, Maple, Route 108, Franklin

Frequently asked questions

What ZIP codes are in Somersworth, NH?

Somersworth, New Hampshire has 1 ZIP code, ranging from 03878 to 03878. The full list, with each ZIP's county and coordinates, is in the table on this page.

What county is Somersworth, NH in?

Somersworth is in Strafford county.

What are the latitude and longitude of Somersworth, NH?

The approximate center of Somersworth, New Hampshire is latitude 43.253, longitude -70.885. Coordinates for each ZIP code are listed in the table above.

How many ZIP codes does Somersworth, NH have?

Somersworth has 1 ZIP code.

How many addresses are in Somersworth, NH?

Somersworth, New Hampshire has about 30,882 known street addresses in the sthan.io US address database.

What are the most common streets in Somersworth, NH?

Some of the most common street names in Somersworth are High, Sherwood, Green, Maplewood, Main, Government.

What cities are near Somersworth, NH?

Cities near Somersworth include Rollinsford (3 mi), Berwick (4 mi), Dover (4 mi), Rochester (5 mi), Madbury (6 mi).

Cities near Somersworth

Rollinsford, NH (3 mi) Berwick, ME (4 mi) Dover, NH (4 mi) Rochester, NH (5 mi) Madbury, NH (6 mi) South Berwick, ME (7 mi) Barrington, NH (8 mi) North Berwick, ME (8 mi)

All New Hampshire cities →

Need this for any US address, in code?

Get the ZIP code, county, and coordinates for any US address through the sthan.io API. Free 100 requests/month, no credit card required.

View the API →

Last updated: June 2026 · Data: sthan.io US address database