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ZIP Code Database - Facts & Stats

Data Last Updated: March 1, 2023

ZIP Codes for City of Somersworth, NH

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Area Code(s):603
Timezone(s):Eastern (GMT -05:00)
City Population:11,766 (More Details)
CBSA:Boston-Cambridge-Newton, MA-NH
Congressional District(s):01
Land Area:369 square miles (county)
Water Area:15 square miles (county)

1 ZIP Code

Somersworth, NH ZIP Code Boundaries

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Somersworth, NH Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases

Somersworth, NH Demographic Information *

Total population**11,766
Male population5,614
Female population6,152
Median age (years)37.8
White Population10,523
Black Population162
Indian Population40
Asian Population621
Hawaiian Population2
Hispanic Population296
Median age (Male)37
Median age (Female)38.6
Total households4,862
Family households (families)3,044
Average household size2.42
Average family size2.95
Total housing units5,199
* Demographic data is based on 2010 Census for the City of SOMERSWORTH.
** City and ZIP Code Population will not be equal due to differences in their geographies.


  1. U.S. Postal Service [Last Updated: 2/1/2023],
  2. Internal Data Creation [Last Updated: 2/1/2023],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],