New London ZIP Codes — Merrimack County, NH

There is one unique ZIP code in New London, New Hampshire and it is 03257. Area code: 603.

ZIP codes

23.55

sq mi land

3.09

sq mi water

603

area code

New London, NH ZIP code map

About New London, NH

New London, New Hampshire, is a charming town nestled in Merrimack County. This picturesque community is known for its beautiful landscapes and tranquil atmosphere, making it a desirable place to live and visit. Visitors can enjoy outdoor activities and rich local culture throughout the year.

Location & geography

New London is located in the central part of New Hampshire, roughly 25 miles from the state capital of Concord. The town is bordered by several other communities, including Newbury to the west, Sutton to the north, and Wilmot to the northeast. The land area of New London spans 23.55 square miles, complemented by a water area of 3.09 square miles, featuring scenic lakes and rivers.

Community & economy

The community of New London is characterized by its friendly, small-town atmosphere and a vibrant mix of residents and visitors. It has a diverse economy featuring industries such as tourism, education, and local artisanal businesses, which contribute to the town's unique character. Daily life in New London revolves around local events, outdoor recreation, and cultural activities, creating a strong sense of community among its residents.

Transportation

New London is conveniently accessible via Interstate 89, which provides quick connections to nearby cities and attractions. The nearest major airport is Lebanon Municipal Airport, located approximately 30 miles away, offering regional flights. Local transit options are limited, but the town's layout makes it suitable for biking and walking.

History

New London was incorporated in 1777 and originally attracted settlers for its natural resources and fertile land. The town has a rich history involving agriculture and small-scale manufacturing, which laid the groundwork for its economic development. Over the years, New London has become a hub for tourists seeking outdoor recreation and cultural experiences.

Did you know?

One surprising fact about New London is that it is home to Colby-Sawyer College, an institution that has been a significant part of the town's identity since 1837. Additionally, the town hosts the picturesque Lake Sunapee, which attracts visitors for boating, fishing, and swimming during summer months.

ZIP codes for New London, NH (1)

ZIP code	City	County	Map
03257	New London	Merrimack	View map

Demographics & statistics

4,381

Population

50.7

Median age

$84,891

Median household income

$51,090

Per capita income

$455,200

Median home value

$1,387

Median monthly rent

90.6%

Home ownership

3.0%

Poverty rate

2.5%

Unemployment

2,288

Housing units

61.7%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

118

10–14

176

15–19

225

234

20–24

299

132

25–34

168

133

35–44

170

142

45–54

181

55–59

144

60–64

184

291

65–74

373

259

75–84

332

122

85+

155

← Male

Female →

Age summary

Group	Count	%
Under 18	559	12.8%
18 and over	3,822	87.2%
65 and over	1,532	35.0%
Median age	50.7 years

Race & ethnicity

White 90.4%

Two or more races 4.8%

Hispanic or Latino 3.4%

Black or African American 0.9%

Asian 0.4%

Group	Count	%
White	4,102	90.4%
Two or more races	218	4.8%
Hispanic or Latino	156	3.4%
Black or African American	43	0.9%
Asian	18	0.4%

Household income

Under $10k 2.3%

$10k–$15k 4.0%

$15k–$25k 6.4%

$25k–$35k 7.7%

$35k–$50k 6.6%

$50k–$75k 17.2%

$75k–$100k 9.8%

$100k–$150k 11.2%

$150k–$200k 11.2%

$200k+ 23.7%

Range	% of households
Under $10k	2.3%
$10k–$15k	4.0%
$15k–$25k	6.4%
$25k–$35k	7.7%
$35k–$50k	6.6%
$50k–$75k	17.2%
$75k–$100k	9.8%
$100k–$150k	11.2%
$150k–$200k	11.2%
$200k+	23.7%
Median income	$84,891

Housing

Home values

Under $50k 1.4%

$50k–$100k 1.3%

$100k–$150k 2.8%

$150k–$200k 1.6%

$200k–$300k 22.6%

$300k–$500k 26.8%

$500k–$1M 35.3%

$1M+ 8.3%

Housing overview

Metric	Value
Median home value	$455,200
Median rent / month	$1,387
Owner occupied	90.6%
Renter occupied	9.4%
Vacant	33.3%
Single-family detached	78.8%
Large apartment buildings	7.8%
Mobile homes	0.0%
Median rooms	6.5
Avg household size (owned)	2.17

Year built

Era	%
2020 or later	0.0%
2010–2019	4.6%
2000–2009	11.7%
1990–1999	12.5%
1980–1989	21.0%
1970–1979	11.8%
1960–1969	9.5%
1950–1959	4.0%
1940–1949	6.1%
1939 or earlier	18.6%

Bedrooms

Size	% of units
No bedroom (studio)	2.1%
1 bedroom	6.4%
2 bedrooms	21.7%
3 bedrooms	41.9%
4 bedrooms	20.1%
5+ bedrooms	7.7%

Vehicles per household

Vehicles	% of households
No vehicle	7.4%
1 vehicle	35.2%
2 vehicles	36.7%
3 or more	20.6%

Heating fuel

Fuel type	%
Utility gas	4.1%
Electricity	5.5%
Propane / LP gas	33.9%
Fuel oil	45.8%
Wood	8.7%

Households & families

Household type	Count	%
Married-couple family	954	58.5%
Cohabiting couple	77	4.7%
Male householder, no spouse	183	11.2%
Female householder, no spouse	416	25.5%
Households with children under 18	317	19.4%
Households with seniors (65+)	1,028	63.1%
Average household size	2.15

Marital status

Status	Male	Female
Never married	30.7%	34.7%
Married	57.9%	45.2%
Separated	0.2%	0.4%
Widowed	4.9%	14.0%
Divorced	6.2%	5.7%

Education

Less than 9th grade 0.3%

Some HS, no diploma 0.5%

HS graduate 10.5%

Some college, no degree 11.5%

Associate's degree 15.5%

Bachelor's degree 34.2%

Graduate / professional 27.5%

Metric	%
HS diploma or higher	99.2%
Bachelor's or higher	61.7%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	76	5.4%
Kindergarten	27	1.9%
Elementary school	236	16.7%
High school	158	11.2%
College / grad school	916	64.8%

Employment

Industry of employment

Education & healthcare 33.8%

Professional & management 16.9%

Manufacturing 9.4%

Retail trade 8.7%

Arts, food & hospitality 6.9%

Public administration 4.9%

Construction 4.7%

Finance & real estate 3.3%

Other services 3.1%

Wholesale trade 2.7%

Information 2.3%

Transportation & utilities 2.1%

Agriculture & mining 1.0%

Occupation

Category	%
Management, business & arts	57.4%
Service	10.5%
Sales & office	22.8%
Natural resources & construction	3.2%
Production & transportation	6.1%

Employment type

Type	%
Private sector	77.8%
Government	11.0%
Self-employed	11.1%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	70.1%
Carpool	2.6%
Public transit	0.0%
Walk	3.9%
Other means	2.2%
Avg commute (minutes)	28.4

Poverty

All people 3.0%

Under 18 years 0.0%

18 and over 3.6%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	56.6%
Retirement income	42.4%
Supplemental Security	2.1%
Cash public assistance	1.7%
Food stamps / SNAP	1.7%

Health indicators

Condition	%
High blood pressure	31.0%
High cholesterol	29.7%
Heart disease	6.6%
Stroke	2.8%
Asthma	10.4%
Arthritis	28.5%
Kidney disease	2.8%
Pulmonary disease	5.3%
Cancer	9.4%

Behavior / access	%
Binge drinking	15.2%
No physical activity	14.7%
Less than 7 hrs sleep	26.7%
Fair or poor health	9.3%
Poor mental health	12.7%
Poor physical health	8.0%
No health insurance	7.6%
Visited doctor (checkup)	77.9%
Visited dentist	77.1%
Cholesterol screening	91.7%
Teeth loss	8.3%

Veterans & disability

Veterans	Count	%
Civilian veterans	309	8.1%

Disability	%
Any disability	12.1%
Under 18	0.0%
18–64 years	6.1%
65 and over	26.1%

Health insurance coverage

Type	%
Private insurance	82.6%
Public insurance	37.6%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	4,217	96.3%
Spanish	29	0.7%
Other Indo-European	23	0.5%
Asian & Pacific Islander	3	0.1%
Other languages	3	0.1%

Place of birth & citizenship

Origin	Count	%
Native born (US)	4,179	95.4%
Born in same state	4,153	94.8%
Born in different state	1,234	28.2%
Foreign born	26	0.6%
Naturalized citizen	202	4.6%
Not a US citizen	121	59.9%

Ancestry

Ancestry	Count	%
French	992	22.6%
Italian	603	13.8%
Arab	228	5.2%
German	193	4.4%

Ancestry	Count	%
English	82	1.9%
Polish	43	1%
Dutch	37	0.8%
Norwegian	23	0.5%

Technology access

Metric	% of households
Computer access	37.2%
Internet access	91.7%

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

Frequently asked questions

What ZIP codes does New London, NH have?

New London, NH has one ZIP code: 03257. Each ZIP code serves a distinct delivery area within the city and surrounding region.