Dover ZIP Codes — Strafford County, NH

There are 3 unique ZIP codes in Dover, New Hampshire. Area code: 603.

ZIP codes

27.28

sq mi land

2.32

sq mi water

603

area code

Dover, NH ZIP code map

About Dover, NH

Dover, New Hampshire, is a vibrant city located in Strafford County that boasts a rich history and diverse community. Known for its picturesque landscapes and historic architecture, Dover combines small-town charm with modern amenities. As one of the oldest cities in New Hampshire, it offers a unique blend of cultural heritage and contemporary living.

Location & geography

Dover is situated in the southeastern part of New Hampshire, approximately 13 miles from Portsmouth, 21 miles from Concord, and 50 miles from Boston, Massachusetts. The city encompasses a land area of 27.28 square miles and features a water area of 2.32 square miles, contributing to its scenic beauty. The terrain includes lush green spaces, rivers, and parks, making it ideal for outdoor activities.

Community & economy

The character of Dover is defined by its close-knit community, which celebrates a rich tapestry of cultural events throughout the year. With industries ranging from manufacturing and healthcare to education and retail, the local economy is robust and diverse. Daily life in Dover offers residents a welcoming atmosphere with access to various recreational facilities, parks, and local businesses.

Transportation

Dover is served by major routes including New Hampshire Route 16, which connects to the larger highway system. The nearest airport is Portsmouth International Airport, located approximately 10 miles away, providing convenient air travel options. Public transit options are limited, but the city is accessible via local bus services and well-maintained roadways.

History

Dover was originally settled in 1623 and incorporated in 1637, making it one of the oldest continuously inhabited communities in New Hampshire. Key industries in its early days included shipbuilding and textile manufacturing, with notable events like the establishment of the Dover Mills in the 19th century shaping its economy. The city's long-standing history is marked by its contributions to the region's development and culture.

Did you know?

One surprising fact about Dover is that it is home to the oldest continuously operating ferry service in the United States, which operates across the Piscataqua River. Additionally, the city has a rich historical heritage, including being the birthplace of several notable figures in American history.

ZIP codes for Dover, NH (3)

ZIP code	City	County	Map
03820	Dover	Strafford	View map
03821	Dover	Strafford	View map
03822	Dover	Strafford	View map

Demographics & statistics

32,925

Population

37.2

Median age

$90,868

Median household income

$52,729

Per capita income

$368,200

Median home value

$1,436

Median monthly rent

52.0%

Home ownership

7.6%

Poverty rate

3.7%

Unemployment

8,242

Housing units

50.7%

Bachelor's or higher

Age distribution

Male Female

868

Under 5

882

661

5–9

671

719

10–14

730

658

15–19

669

1,648

20–24

1,673

3,052

25–34

3,098

2,150

35–44

2,182

1,924

45–54

1,954

1,089

55–59

1,106

872

60–64

885

1,515

65–74

1,539

823

75–84

835

358

85+

364

← Male

Female →

Age summary

Group	Count	%
Under 18	5,609	17.0%
18 and over	27,316	83.0%
65 and over	5,434	16.5%
Median age	37.2 years

Race & ethnicity

White 86.9%

Two or more races 4.3%

Asian 3.9%

Hispanic or Latino 2.5%

Black or African American 1.3%

Other race 1.2%

Group	Count	%
White	29,344	86.9%
Two or more races	1,454	4.3%
Asian	1,302	3.9%
Hispanic or Latino	846	2.5%
Black or African American	433	1.3%
Other race	392	1.2%

Household income

Under $10k 2.3%

$10k–$15k 3.9%

$15k–$25k 4.3%

$25k–$35k 7.2%

$35k–$50k 9.5%

$50k–$75k 14.9%

$75k–$100k 12.5%

$100k–$150k 16.6%

$150k–$200k 13.3%

$200k+ 15.6%

Range	% of households
Under $10k	2.3%
$10k–$15k	3.9%
$15k–$25k	4.3%
$25k–$35k	7.2%
$35k–$50k	9.5%
$50k–$75k	14.9%
$75k–$100k	12.5%
$100k–$150k	16.6%
$150k–$200k	13.3%
$200k+	15.6%
Median income	$90,868

Housing

Home values

Under $50k 2.2%

$50k–$100k 2.8%

$100k–$150k 1.9%

$150k–$200k 1.3%

$200k–$300k 22.1%

$300k–$500k 46.6%

$500k–$1M 21.2%

$1M+ 1.9%

Housing overview

Metric	Value
Median home value	$368,200
Median rent / month	$1,436
Owner occupied	52.0%
Renter occupied	48.0%
Vacant	4.2%
Single-family detached	42.0%
Large apartment buildings	15.0%
Mobile homes	2.9%
Median rooms	5.2
Avg household size (owned)	2.43

Year built

Era	%
2020 or later	0.9%
2010–2019	7.2%
2000–2009	11.1%
1990–1999	10.4%
1980–1989	14.9%
1970–1979	11.9%
1960–1969	7.8%
1950–1959	7.5%
1940–1949	2.0%
1939 or earlier	26.2%

Bedrooms

Size	% of units
No bedroom (studio)	3.4%
1 bedroom	15.2%
2 bedrooms	34.6%
3 bedrooms	29.1%
4 bedrooms	14.2%
5+ bedrooms	3.5%

Vehicles per household

Vehicles	% of households
No vehicle	4.1%
1 vehicle	37.9%
2 vehicles	43.7%
3 or more	14.3%

Heating fuel

Fuel type	%
Utility gas	40.5%
Electricity	16.6%
Propane / LP gas	9.3%
Fuel oil	28.5%
Wood	1.3%
Solar	0.4%
No fuel used	1.9%

Households & families

Household type	Count	%
Married-couple family	6,559	44.9%
Cohabiting couple	1,397	9.6%
Male householder, no spouse	3,038	20.8%
Female householder, no spouse	3,630	24.8%
Households with children under 18	3,475	23.8%
Households with seniors (65+)	3,838	26.2%
Average household size	2.18

Marital status

Status	Male	Female
Never married	38.4%	35.3%
Married	49.1%	46.2%
Separated	0.8%	1.9%
Widowed	1.7%	5.6%
Divorced	10.0%	11.0%

Education

Less than 9th grade 1.4%

Some HS, no diploma 2.2%

HS graduate 20.0%

Some college, no degree 15.0%

Associate's degree 10.7%

Bachelor's degree 33.1%

Graduate / professional 17.6%

Metric	%
HS diploma or higher	96.4%
Bachelor's or higher	50.7%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	455	7.3%
Kindergarten	292	4.7%
Elementary school	2,137	34.3%
High school	1,293	20.8%
College / grad school	2,047	32.9%

Employment

Industry of employment

Education & healthcare 24.6%

Professional & management 13.8%

Manufacturing 12.6%

Arts, food & hospitality 11.4%

Finance & real estate 10.1%

Retail trade 9.1%

Other services 4.7%

Public administration 4.6%

Construction 3.1%

Transportation & utilities 2.5%

Information 1.8%

Wholesale trade 1.5%

Agriculture & mining 0.1%

Occupation

Category	%
Management, business & arts	50.5%
Service	16.0%
Sales & office	19.9%
Natural resources & construction	5.2%
Production & transportation	8.4%

Employment type

Type	%
Private sector	80.3%
Government	14.2%
Self-employed	5.3%
Unpaid family workers	0.2%

Commute

Method	%
Drive alone	75.8%
Carpool	4.6%
Public transit	2.2%
Walk	1.8%
Other means	0.9%
Avg commute (minutes)	23.2

Poverty

All people 7.6%

Under 18 years 5.5%

18 and over 8.0%

Married-couple families 2.3%

Female-led households 11.0%

Income support

Source	% of households
Social Security	28.0%
Retirement income	22.9%
Supplemental Security	4.4%
Cash public assistance	2.6%
Food stamps / SNAP	5.8%

Health indicators

Condition	%
High blood pressure	26.9%
High cholesterol	29.3%
Heart disease	5.0%
Stroke	2.2%
Asthma	10.3%
Arthritis	20.9%
Kidney disease	2.3%
Pulmonary disease	5.1%
Cancer	6.1%

Behavior / access	%
Binge drinking	19.0%
No physical activity	18.5%
Less than 7 hrs sleep	29.5%
Fair or poor health	10.5%
Poor mental health	15.4%
Poor physical health	8.8%
No health insurance	10.0%
Visited doctor (checkup)	71.3%
Visited dentist	69.0%
Cholesterol screening	89.4%
Teeth loss	10.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	1,576	5.8%

Disability	%
Any disability	11.8%
Under 18	2.9%
18–64 years	9.8%
65 and over	30.2%

Health insurance coverage

Type	%
Private insurance	78.9%
Public insurance	29.0%
Uninsured under 19	2.3%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	31,175	94.7%
Spanish	685	2.2%
Other Indo-European	187	0.6%
Asian & Pacific Islander	274	0.9%
Other languages	217	0.7%

Place of birth & citizenship

Origin	Count	%
Native born (US)	31,010	94.2%
Born in same state	30,343	92.2%
Born in different state	13,997	42.5%
Foreign born	667	2.0%
Naturalized citizen	1,915	5.8%
Not a US citizen	1,075	56.1%

Ancestry

Ancestry	Count	%
Italian	8,026	24.4%
French	6,963	21.1%
German	2,384	7.2%
Arab	891	2.7%
English	270	0.8%

Ancestry	Count	%
Polish	261	0.8%
Norwegian	226	0.7%
Dutch	130	0.4%
Irish	76	0.2%

Technology access

Metric	% of households
Computer access	44.4%
Internet access	95.7%

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

Frequently asked questions

What ZIP codes does Dover, NH have?

Dover, NH has two ZIP codes: 03820 and 03822. Each ZIP code serves a distinct delivery area within the city and surrounding region.