03257 ZIP Code — New London, NH

Merrimack County, New Hampshire

ZIP code 03257 is located in New London, New Hampshire, within Merrimack County. It covers approximately 23.55 square miles and serves a population of 4,381 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 603.

About ZIP code 03257

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1980s, giving the area an established character. Median home value is $455,200. Owner-occupancy is high at 91%, well above the national average.

The gap between median ($84,891) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 3% is below the national average. 57% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 28 minutes is near the national average. Remote work is prevalent — 21% of workers work from home.

Educational attainment is high — 62% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 03257 reflects a community defined by a highly educated population, high homeownership, a high rate of remote workers, and a significant Social Security-dependent population.

4,381

population

23.55

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

03257 ZIP code map

Cities in ZIP code 03257

Below are the cities the US Postal Service accepts for ZIP code 03257. Using any city not on this list may result in mail delivery delays.

City	Status
New London	Acceptable
New London	Preferred

Nearby ZIP codes

03233 Elkins (2.2 mi) 03287 Wilmot (3.4 mi) 03284 Springfield (5.2 mi) 03782 Sunapee (5.7 mi) 03255 Newbury (6.8 mi) 03216 Andover (9.7 mi) 03278 Warner (9.7 mi) 03753 Grantham (9.8 mi) 03230 Danbury (10.2 mi) 03752 Goshen (10.8 mi) 03240 Grafton (10.9 mi) 03773 Newport (10.9 mi)

Demographics updated 05/2026

Population
Total population	4,381
Population density	186 / sq mi
State FIPS	33
County FIPS	013

Geography
Land area	23.55 sq mi
Water area	3.09 sq mi
Latitude	43.4201
Longitude	-71.9851
Timezone	Eastern (ET)
Area code	603

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	28.4%	30.8%	31.0%
$50k – $100k	29.5%	32.4%	31.2%
$100k – $200k	28.0%	28.6%	28.1%
Over $200k	14.2%	8.1%	9.7%

Demographics & statistics

4,381

Population

186

People per sq mi

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

Income range	This ZIP	County avg	State avg
Under $50k	28.4%	30.8%	31.0%
$50k – $100k	29.5%	32.4%	31.2%
$100k – $200k	28.0%	28.6%	28.1%
Over $200k	14.2%	8.1%	9.7%

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%
Work from home	21.1%
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	%
Obesity	23.1%
High blood pressure	31.0%
High cholesterol	29.7%
Diabetes	8.0%
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	%
Smoking	8.4%
Binge drinking	15.2%
No physical activity	14.7%
Less than 7 hrs sleep	26.7%
Depression	22.1%
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%
No insurance	2.9%
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 about ZIP code 03257

What city is ZIP code 03257 in?

ZIP code 03257 is primarily assigned to New London, New Hampshire.

What county is ZIP code 03257 in?

ZIP code 03257 falls within Merrimack County, New Hampshire.

Does ZIP code 03257 have an older population?

35% of residents in ZIP code 03257 are 65 or older, above the national average of ~17%.

Does ZIP code 03257 have a large retiree population?

57% of households in ZIP code 03257 receive Social Security income, suggesting a significant retiree or disability population.

How educated is the population of ZIP code 03257?

62% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

Is ZIP code 03257 mostly owner-occupied?

91% of occupied units in ZIP code 03257 are owner-occupied, well above the national average.

What timezone is ZIP code 03257 in?

ZIP code 03257 observes the EST timezone.