03603 ZIP Code — Charlestown, NH

Sullivan County, New Hampshire

ZIP code 03603 is located in Charlestown, New Hampshire, within Sullivan County. It covers approximately 44.25 square miles and serves a population of 5,218 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 603.

About ZIP code 03603

The housing stock consists of a higher-than-average concentration of mobile homes. Most homes were built in the 1980s, giving the area an established character. Median home value is $144,300. Owner-occupancy sits near the national average at 74%.

Median household income is $47,259. 44% 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 27 minutes is near the national average.

College attainment at 21% is below the national average, consistent with a trades and production-oriented local economy.

5,218

population

44.25

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

03603 ZIP code map

Cities in ZIP code 03603

Below are the cities the US Postal Service accepts for ZIP code 03603. Using any city not on this list may result in mail delivery delays.

City	Status
Charlestown	Acceptable
Charlestown	Preferred

Nearby ZIP codes

03601 Acworth (4.1 mi) 05156 Springfield (6.7 mi) 03605 Lempster (6.9 mi) 03743 Claremont (7.2 mi) 05101 Bellows Falls (8.2 mi) 03602 Alstead (8.6 mi) 05150 North Springfield (9.7 mi) 05154 Saxtons River (9.8 mi) 05151 Perkinsville (11.3 mi) 05158 Westminster (11.6 mi) 05141 Cambridgeport (11.9 mi) 03608 Walpole (12.1 mi)

Demographics updated 05/2026

Population
Total population	5,218
Population density	118 / sq mi
State FIPS	33
County FIPS	019

Geography
Land area	44.25 sq mi
Water area	2.28 sq mi
Latitude	43.2480
Longitude	-72.3762
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	47.2%	39.4%	31.0%
$50k – $100k	39.3%	36.1%	31.2%
$100k – $200k	10.1%	19.6%	28.1%
Over $200k	3.5%	4.9%	9.7%

Demographics & statistics

5,218

Population

118

People per sq mi

49.6

Median age

$47,259

Median household income

$31,665

Per capita income

$144,300

Median home value

$1,106

Median monthly rent

74.0%

Home ownership

16.5%

Poverty rate

5.3%

Unemployment

1,866

Housing units

20.7%

Bachelor's or higher

Age distribution

Male Female

155

Under 5

158

143

5–9

145

111

10–14

114

154

15–19

156

20–24

278

25–34

284

303

35–44

308

288

45–54

293

201

55–59

205

227

60–64

232

447

65–74

455

182

75–84

186

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	1,034	19.8%
18 and over	4,184	80.2%
65 and over	1,347	25.8%
Median age	49.6 years

Race & ethnicity

White 94.5%

Two or more races 2.8%

Asian 1.7%

Hispanic or Latino 1%

Black or African American 0.1%

Group	Count	%
White	4,978	94.5%
Two or more races	147	2.8%
Asian	87	1.7%
Hispanic or Latino	52	1%
Black or African American	4	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	47.2%	39.4%	31.0%
$50k – $100k	39.3%	36.1%	31.2%
$100k – $200k	10.1%	19.6%	28.1%
Over $200k	3.5%	4.9%	9.7%

Under $10k 11.4%

$10k–$15k 6.0%

$15k–$25k 10.4%

$25k–$35k 7.8%

$35k–$50k 14.8%

$50k–$75k 13.8%

$75k–$100k 12.2%

$100k–$150k 16.3%

$150k–$200k 0.9%

$200k+ 6.5%

Range	% of households
Under $10k	11.4%
$10k–$15k	6.0%
$15k–$25k	10.4%
$25k–$35k	7.8%
$35k–$50k	14.8%
$50k–$75k	13.8%
$75k–$100k	12.2%
$100k–$150k	16.3%
$150k–$200k	0.9%
$200k+	6.5%
Median income	$47,259

Housing

Home values

Under $50k 20.0%

$50k–$100k 15.6%

$100k–$150k 15.9%

$150k–$200k 17.1%

$200k–$300k 25.5%

$300k–$500k 4.7%

$500k–$1M 1.2%

Housing overview

Metric	Value
Median home value	$144,300
Median rent / month	$1,106
Owner occupied	74.0%
Renter occupied	26.0%
Vacant	16.3%
Single-family detached	56.3%
Large apartment buildings	3.1%
Mobile homes	28.1%
Median rooms	4.9
Avg household size (owned)	2.69

Year built

Era	%
2020 or later	0.0%
2010–2019	3.9%
2000–2009	5.1%
1990–1999	9.8%
1980–1989	27.8%
1970–1979	14.5%
1960–1969	10.4%
1950–1959	7.2%
1940–1949	1.6%
1939 or earlier	19.7%

Bedrooms

Size	% of units
No bedroom (studio)	0.8%
1 bedroom	7.4%
2 bedrooms	44.3%
3 bedrooms	34.6%
4 bedrooms	9.5%
5+ bedrooms	3.4%

Vehicles per household

Vehicles	% of households
No vehicle	4.2%
1 vehicle	36.2%
2 vehicles	38.5%
3 or more	21.1%

Heating fuel

Fuel type	%
Utility gas	1.5%
Electricity	4.3%
Propane / LP gas	20.3%
Fuel oil	58.8%
Wood	13.5%
Solar	0.6%

Households & families

Household type	Count	%
Married-couple family	1,003	50.3%
Cohabiting couple	145	7.3%
Male householder, no spouse	339	17.0%
Female householder, no spouse	509	25.5%
Households with children under 18	402	20.1%
Households with seniors (65+)	982	49.2%
Average household size	2.60

Marital status

Status	Male	Female
Never married	41.1%	22.7%
Married	44.9%	53.1%
Separated	0.0%	0.3%
Widowed	2.4%	10.7%
Divorced	11.5%	13.2%

Education

Less than 9th grade 1.0%

Some HS, no diploma 8.9%

HS graduate 36.3%

Some college, no degree 14.9%

Associate's degree 18.3%

Bachelor's degree 15.0%

Graduate / professional 5.6%

Metric	%
HS diploma or higher	90.1%
Bachelor's or higher	20.7%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	46	5.5%
Kindergarten	72	8.6%
Elementary school	360	43.0%
High school	281	33.5%
College / grad school	79	9.4%

Employment

Industry of employment

Education & healthcare 25.3%

Manufacturing 25.1%

Retail trade 12.8%

Professional & management 7.8%

Construction 6.7%

Transportation & utilities 5.6%

Finance & real estate 4.7%

Public administration 3.5%

Arts, food & hospitality 3.2%

Other services 2.2%

Wholesale trade 1.8%

Information 0.8%

Agriculture & mining 0.4%

Occupation

Category	%
Management, business & arts	33.0%
Service	8.1%
Sales & office	17.0%
Natural resources & construction	10.9%
Production & transportation	30.9%

Employment type

Type	%
Private sector	80.7%
Government	13.0%
Self-employed	5.6%
Unpaid family workers	0.8%

Commute

Method	%
Drive alone	79.5%
Carpool	14.9%
Public transit	0.0%
Walk	1.7%
Work from home	3.8%
Other means	0.2%
Avg commute (minutes)	26.5

Poverty

All people 16.5%

Under 18 years 13.6%

18 and over 17.2%

Married-couple families 3.7%

Female-led households 24.4%

Income support

Source	% of households
Social Security	44.1%
Retirement income	29.4%
Supplemental Security	5.2%
Cash public assistance	3.8%
Food stamps / SNAP	14.2%

Health indicators

Condition	%
Obesity	34.7%
High blood pressure	32.4%
High cholesterol	32.6%
Diabetes	10.3%
Heart disease	6.9%
Stroke	3.2%
Asthma	11.5%
Arthritis	28.6%
Kidney disease	3.0%
Pulmonary disease	8.1%
Cancer	7.1%

Behavior / access	%
Smoking	19.7%
Binge drinking	16.3%
No physical activity	22.9%
Less than 7 hrs sleep	34.8%
Depression	24.5%
Fair or poor health	15.2%
Poor mental health	15.1%
Poor physical health	11.7%
No health insurance	12.5%
Visited doctor (checkup)	70.5%
Visited dentist	61.6%
Cholesterol screening	90.1%
Teeth loss	16.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	411	9.8%

Disability	%
Any disability	14.8%
Under 18	2.2%
18–64 years	16.4%
65 and over	21.2%

Health insurance coverage

Type	%
Private insurance	62.8%
Public insurance	44.6%
No insurance	7.0%
Uninsured under 19	8.5%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	4,905	94.0%
Spanish	12	0.2%
Other Indo-European	0	0.0%
Asian & Pacific Islander	1	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	5,094	97.6%
Born in same state	5,078	97.3%
Born in different state	2,514	48.2%
Foreign born	16	0.3%
Naturalized citizen	124	2.4%
Not a US citizen	109	87.9%

Ancestry

Ancestry	Count	%
French	1,362	26.1%
German	560	10.7%
Italian	507	9.7%
Arab	119	2.3%

Ancestry	Count	%
English	63	1.2%
Norwegian	21	0.4%
Polish	13	0.2%

Technology access

Metric	% of households
Computer access	38.3%
Internet access	85.7%

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

Frequently asked questions about ZIP code 03603

What city is ZIP code 03603 in?

ZIP code 03603 is primarily assigned to Charlestown, New Hampshire.

What county is ZIP code 03603 in?

ZIP code 03603 falls within Sullivan County, New Hampshire.

Does ZIP code 03603 have an older population?

26% of residents in ZIP code 03603 are 65 or older, above the national average of ~17%.

Does ZIP code 03603 have a large retiree population?

44% of households in ZIP code 03603 receive Social Security income, suggesting a significant retiree or disability population.

What is the poverty rate in ZIP code 03603?

17% of residents in ZIP code 03603 live below the poverty line, above the national average.

What is the typical home value in ZIP code 03603?

The median home value in ZIP code 03603 is $144,300.

What timezone is ZIP code 03603 in?

ZIP code 03603 observes the EST timezone.