Somersworth ZIP Codes — Strafford County, NH

There is one unique ZIP code in Somersworth, New Hampshire and it is 03878. Area code: 603.

ZIP codes

9.82

sq mi land

0.20

sq mi water

603

area code

Somersworth, NH ZIP code map

About Somersworth, NH

Somersworth, New Hampshire, is a vibrant city situated in Strafford County that offers a blend of historical charm and modern living. With a strong sense of community and an array of local amenities, it serves as an appealing location for families and individuals alike. The city is well-known for its beautiful landscapes and a variety of recreational opportunities.

Location & geography

Located in the southeastern part of New Hampshire, Somersworth is bordered by several neighboring cities, including Dover, approximately 7 miles to the south, and Rochester, around 5 miles to the north. The city encompasses a total land area of 9.82 square miles, complemented by a small water area of 0.20 square miles that adds to its scenic beauty. The terrain is characterized by a mix of residential neighborhoods and green spaces, making it an inviting place for outdoor activities.

Community & economy

The community in Somersworth is known for its friendly atmosphere and strong local pride, fostering a sense of belonging among its residents. Predominantly, the local economy stems from various industries, including manufacturing, retail, and healthcare, providing numerous job opportunities. Daily life is enriched by a variety of local events and activities that highlight the city's culture and encourage community engagement.

Transportation

Somersworth is easily accessible via major highways, particularly the Spaulding Turnpike (NH Route 16), which connects the city to nearby larger urban areas. The nearest named airport is Portsmouth International Airport, located approximately 20 miles away, facilitating travel for both business and leisure. Public transportation options are limited but can connect residents to neighboring cities and towns.

History

Founded in the late 18th century, Somersworth quickly developed into an industrial center, particularly known for its textile mills and manufacturing sectors. Throughout its history, the city has experienced various economic transformations, adapting to the changing needs of its population. Notable events have included the establishment of historic buildings that now serve as reminders of its rich heritage.

Did you know?

One surprising fact about Somersworth is that it was originally part of the larger town of Dover before becoming its own city in 1893. Additionally, the city is home to several historical landmarks, including the Somersworth Historical Society, which aims to preserve the community's rich past.

ZIP codes for Somersworth, NH (1)

ZIP code	City	County	Map
03878	Somersworth	Strafford	View map

Demographics & statistics

12,088

Population

38.2

Median age

$75,833

Median household income

$39,712

Per capita income

$265,200

Median home value

$1,330

Median monthly rent

65.1%

Home ownership

8.7%

Poverty rate

2.8%

Unemployment

3,909

Housing units

27.8%

Bachelor's or higher

Age distribution

Male Female

233

Under 5

226

123

5–9

119

489

10–14

475

352

15–19

342

348

20–24

337

1,236

25–34

1,200

745

35–44

723

841

45–54

817

396

55–59

384

461

60–64

447

568

65–74

552

287

75–84

279

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	2,154	17.8%
18 and over	9,934	82.2%
65 and over	1,794	14.8%
Median age	38.2 years

Race & ethnicity

White 81.9%

Two or more races 6.1%

Asian 4.2%

Hispanic or Latino 4.2%

Black or African American 1.9%

Other race 1.6%

Group	Count	%
White	10,328	81.9%
Two or more races	774	6.1%
Asian	534	4.2%
Hispanic or Latino	525	4.2%
Black or African American	241	1.9%
Other race	205	1.6%

Household income

Under $10k 2.2%

$10k–$15k 3.5%

$15k–$25k 6.5%

$25k–$35k 6.5%

$35k–$50k 9.3%

$50k–$75k 20.1%

$75k–$100k 19.6%

$100k–$150k 15.4%

$150k–$200k 11.7%

$200k+ 5.3%

Range	% of households
Under $10k	2.2%
$10k–$15k	3.5%
$15k–$25k	6.5%
$25k–$35k	6.5%
$35k–$50k	9.3%
$50k–$75k	20.1%
$75k–$100k	19.6%
$100k–$150k	15.4%
$150k–$200k	11.7%
$200k+	5.3%
Median income	$75,833

Housing

Home values

Under $50k 8.7%

$50k–$100k 1.6%

$100k–$150k 4.9%

$150k–$200k 8.4%

$200k–$300k 40.2%

$300k–$500k 33.9%

$500k–$1M 1.8%

$1M+ 0.5%

Housing overview

Metric	Value
Median home value	$265,200
Median rent / month	$1,330
Owner occupied	65.1%
Renter occupied	34.9%
Vacant	8.2%
Single-family detached	47.6%
Large apartment buildings	10.2%
Mobile homes	7.1%
Median rooms	5.3
Avg household size (owned)	2.46

Year built

Era	%
2020 or later	0.0%
2010–2019	3.4%
2000–2009	7.0%
1990–1999	7.1%
1980–1989	16.6%
1970–1979	12.2%
1960–1969	11.2%
1950–1959	11.7%
1940–1949	4.9%
1939 or earlier	25.9%

Bedrooms

Size	% of units
No bedroom (studio)	3.3%
1 bedroom	11.4%
2 bedrooms	33.3%
3 bedrooms	37.5%
4 bedrooms	11.2%
5+ bedrooms	3.3%

Vehicles per household

Vehicles	% of households
No vehicle	7.4%
1 vehicle	31.2%
2 vehicles	43.5%
3 or more	17.9%

Heating fuel

Fuel type	%
Utility gas	17.3%
Electricity	9.7%
Propane / LP gas	12.3%
Fuel oil	53.7%
Wood	1.7%

Households & families

Household type	Count	%
Married-couple family	2,283	43.2%
Cohabiting couple	647	12.2%
Male householder, no spouse	971	18.4%
Female householder, no spouse	1,383	26.2%
Households with children under 18	1,581	29.9%
Households with seniors (65+)	1,400	26.5%
Average household size	2.29

Marital status

Status	Male	Female
Never married	40.8%	29.1%
Married	44.0%	46.9%
Separated	0.7%	0.2%
Widowed	1.5%	7.7%
Divorced	13.1%	16.0%

Education

Less than 9th grade 1.4%

Some HS, no diploma 3.9%

HS graduate 23.9%

Some college, no degree 27.5%

Associate's degree 15.5%

Bachelor's degree 19.6%

Graduate / professional 8.2%

Metric	%
HS diploma or higher	94.7%
Bachelor's or higher	27.8%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	58	2.4%
Kindergarten	0	0.0%
Elementary school	1,143	47.8%
High school	524	21.9%
College / grad school	666	27.9%

Employment

Industry of employment

Manufacturing 19.2%

Education & healthcare 18.5%

Professional & management 12.7%

Retail trade 11.9%

Arts, food & hospitality 7.9%

Public administration 7.9%

Transportation & utilities 6.5%

Finance & real estate 6.2%

Other services 3.2%

Construction 2.8%

Wholesale trade 1.5%

Information 1.4%

Agriculture & mining 0.3%

Occupation

Category	%
Management, business & arts	39.1%
Service	12.9%
Sales & office	22.2%
Natural resources & construction	9.3%
Production & transportation	16.4%

Employment type

Type	%
Private sector	83.7%
Government	12.5%
Self-employed	3.5%
Unpaid family workers	0.2%

Commute

Method	%
Drive alone	75.9%
Carpool	12.8%
Public transit	2.4%
Walk	0.2%
Other means	1.5%
Avg commute (minutes)	25.1

Poverty

All people 8.7%

Under 18 years 9.6%

18 and over 8.6%

Married-couple families 5.1%

Female-led households 11.1%

Income support

Source	% of households
Social Security	28.7%
Retirement income	28.9%
Supplemental Security	8.9%
Cash public assistance	3.5%
Food stamps / SNAP	6.7%

Health indicators

Condition	%
High blood pressure	28.8%
High cholesterol	31.5%
Heart disease	5.3%
Stroke	2.5%
Asthma	10.6%
Arthritis	22.5%
Kidney disease	2.4%
Pulmonary disease	6.1%
Cancer	6.1%

Behavior / access	%
Binge drinking	18.8%
No physical activity	21.5%
Less than 7 hrs sleep	31.5%
Fair or poor health	12.3%
Poor mental health	16.5%
Poor physical health	10.1%
No health insurance	11.8%
Visited doctor (checkup)	71.1%
Visited dentist	65.3%
Cholesterol screening	89.2%
Teeth loss	12.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	869	8.9%

Disability	%
Any disability	13.5%
Under 18	4.9%
18–64 years	11.6%
65 and over	32.4%

Health insurance coverage

Type	%
Private insurance	74.8%
Public insurance	32.4%
Uninsured under 19	3.3%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	11,629	96.2%
Spanish	187	1.6%
Other Indo-European	60	0.5%
Asian & Pacific Islander	0	0.0%
Other languages	60	0.5%

Place of birth & citizenship

Origin	Count	%
Native born (US)	11,372	94.1%
Born in same state	11,088	91.7%
Born in different state	5,939	49.1%
Foreign born	284	2.3%
Naturalized citizen	716	5.9%
Not a US citizen	448	62.6%

Ancestry

Ancestry	Count	%
Italian	2,634	21.8%
French	1,758	14.5%
German	1,052	8.7%
Arab	231	1.9%

Ancestry	Count	%
Polish	108	0.9%
Norwegian	71	0.6%
English	69	0.6%
Irish	10	0.1%

Technology access

Metric	% of households
Computer access	43.7%
Internet access	95.5%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions

What ZIP codes does Somersworth, NH have?

Somersworth, NH has one ZIP code: 03878. Each ZIP code serves a distinct delivery area within the city and surrounding region.