Home > NH > Strafford County > Somersworth > Zip 03878

Zip Code 03878 — Somersworth, NH

03878 is a ZIP Code associated with Somersworth, NH, located within Strafford. The postal region supports an estimated population of 12,205 residents across Data Pending housing units, with a population density of 480.1 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (43.253350, -70.885550)

Data MetricLocal Statistic
Postal / Zip Code03878
Primary CitySomersworth
State / ProvinceNH
CountyStrafford
Total Population12,205
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density480.1 people/sq mi
TimezoneAmerica/New_York

How 03878 Compares

MetricZIP 03878Strafford CountyNH State Average
Population12,205132,7281,394,951
Median IncomeData PendingN/AN/A
Population Density480.1 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 03869Rollinsford3.2 mi2,456N/A
Zip 03820Dover4.4 mi33,440N/A
Zip 03839Rochester4.9 mi4,279N/A
Zip 03868Rochester5.3 mi6,133N/A
Zip 03823Madbury6.1 mi2,203N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →