Somersworth, NH ZIP code
The ZIP code for Somersworth, New Hampshire is 03878. It is in Strafford County.
- Population in these ZIPs
- 12,205
- Avg. median income
- $75,100population-weighted
- Typical home value
- $444,400population-weighted
- Metro area
- Boston-Cambridge-Newton, MA-NH
Loading map…
Click anywhere on the map to see which ZIP code it's in.
Somersworth, NH ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 03878 | 12,205 | $75,136 | $444,400 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Somersworth
- Rollinsford 3 mi
- Dover 4 mi
- Rochester 5 mi
- Madbury 6 mi
- Barrington 8 mi
- Durham 10 mi
- Lee 11 mi
- Farmington 12 mi
- Newmarket 13 mi
- Portsmouth 14 mi
- Strafford 14 mi
- Milton 14 mi
Frequently asked questions
What is the ZIP code for Somersworth, NH?
The ZIP code for Somersworth, NH is 03878.
What county is Somersworth, New Hampshire in?
Somersworth ZIP codes are in Strafford County.