03873 ZIP Code — Sandown, NH

Rockingham County, New Hampshire

ZIP code 03873 is located in Sandown, New Hampshire, within Rockingham County. It covers approximately 13.94 square miles and serves a population of 6,536 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 603.

About ZIP code 03873

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 $374,800. Owner-occupancy is high at 85%, well above the national average.

Median household income is $125,888. 35% 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 35 minutes is near the national average.

Educational attainment is near the national average, with 30% of residents holding a bachelor's degree or higher.

Overall, ZIP code 03873 reflects a community defined by high homeownership and a significant Social Security-dependent population.

6,536

population

13.94

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

03873 ZIP code map

Cities in ZIP code 03873

Below are the cities the US Postal Service accepts for ZIP code 03873. Using any city not on this list may result in mail delivery delays.

City	Status
Sandown	Preferred

Nearby ZIP codes

03819 Danville (3.2 mi) 03841 Hampstead (3.4 mi) 03036 Chester (3.9 mi) 03826 East Hampstead (4.5 mi) 03044 Fremont (4.9 mi) 03038 Derry (5.4 mi) 03038 Derry (5.4 mi) 03848 Kingston (6.4 mi) 03811 Atkinson (6.4 mi) 03077 Raymond (7 mi) 03865 Plaistow (7.6 mi) 03858 Newton (8.5 mi)

Demographics updated 05/2026

Population
Total population	6,536
Population density	469 / sq mi
State FIPS	33
County FIPS	015

Geography
Land area	13.94 sq mi
Water area	0.49 sq mi
Latitude	42.9309
Longitude	-71.1844
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	21.4%	23.5%	31.0%
$50k – $100k	21.8%	29.1%	31.2%
$100k – $200k	46.0%	32.8%	28.1%
Over $200k	10.8%	14.6%	9.7%

Demographics & statistics

6,536

Population

469

People per sq mi

38.8

Median age

$125,888

Median household income

$44,041

Per capita income

$374,800

Median home value

$1,807

Median monthly rent

84.5%

Home ownership

10.3%

Poverty rate

4.4%

Unemployment

1,933

Housing units

29.8%

Bachelor's or higher

Age distribution

Male Female

191

Under 5

213

126

5–9

140

269

10–14

300

231

15–19

258

170

20–24

191

348

25–34

390

380

35–44

426

510

45–54

570

322

55–59

361

189

60–64

211

270

65–74

303

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	1,544	23.6%
18 and over	4,992	76.4%
65 and over	740	11.3%
Median age	38.8 years

Race & ethnicity

White 93.5%

Hispanic or Latino 2.6%

Two or more races 2.2%

Other race 1.1%

Black or African American 0.6%

Group	Count	%
White	6,273	93.5%
Hispanic or Latino	172	2.6%
Two or more races	148	2.2%
Other race	76	1.1%
Black or African American	39	0.6%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	21.4%	23.5%	31.0%
$50k – $100k	21.8%	29.1%	31.2%
$100k – $200k	46.0%	32.8%	28.1%
Over $200k	10.8%	14.6%	9.7%

Under $10k 1.5%

$10k–$15k 8.4%

$25k–$35k 1.4%

$35k–$50k 9.8%

$50k–$75k 10.6%

$75k–$100k 12.6%

$100k–$150k 15.5%

$150k–$200k 18.9%

$200k+ 21.4%

Range	% of households
Under $10k	1.5%
$10k–$15k	8.4%
$25k–$35k	1.4%
$35k–$50k	9.8%
$50k–$75k	10.6%
$75k–$100k	12.6%
$100k–$150k	15.5%
$150k–$200k	18.9%
$200k+	21.4%
Median income	$125,888

Housing

Home values

$50k–$100k 0.2%

$100k–$150k 1.7%

$150k–$200k 0.9%

$200k–$300k 14.2%

$300k–$500k 60.3%

$500k–$1M 22.8%

Housing overview

Metric	Value
Median home value	$374,800
Median rent / month	$1,807
Owner occupied	84.5%
Renter occupied	15.5%
Vacant	3.0%
Single-family detached	83.5%
Large apartment buildings	0.0%
Mobile homes	1.5%
Median rooms	5.9
Avg household size (owned)	3.02

Year built

Era	%
2020 or later	0.0%
2010–2019	7.0%
2000–2009	18.3%
1990–1999	7.1%
1980–1989	30.9%
1970–1979	10.5%
1960–1969	4.4%
1950–1959	2.5%
1940–1949	5.1%
1939 or earlier	14.3%

Bedrooms

Size	% of units
No bedroom (studio)	0.8%
1 bedroom	0.7%
2 bedrooms	31.6%
3 bedrooms	47.2%
4 bedrooms	14.8%
5+ bedrooms	4.9%

Vehicles per household

Vehicles	% of households
No vehicle	1.6%
1 vehicle	17.5%
2 vehicles	37.7%
3 or more	43.2%

Heating fuel

Fuel type	%
Electricity	11.1%
Propane / LP gas	34.5%
Fuel oil	48.8%
Wood	2.8%
No fuel used	0.8%

Households & families

Household type	Count	%
Married-couple family	1,467	66.5%
Cohabiting couple	218	9.9%
Male householder, no spouse	177	8.0%
Female householder, no spouse	344	15.6%
Households with children under 18	928	42.1%
Households with seniors (65+)	534	24.2%
Average household size	2.96

Marital status

Status	Male	Female
Never married	28.3%	27.2%
Married	63.6%	57.9%
Separated	0.5%	6.3%
Widowed	1.5%	2.3%
Divorced	6.1%	6.3%

Education

Less than 9th grade 1.2%

Some HS, no diploma 4.3%

HS graduate 26.0%

Some college, no degree 23.5%

Associate's degree 15.2%

Bachelor's degree 15.7%

Graduate / professional 14.0%

Metric	%
HS diploma or higher	94.5%
Bachelor's or higher	29.8%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	39	2.8%
Kindergarten	49	3.5%
Elementary school	651	46.9%
High school	398	28.7%
College / grad school	251	18.1%

Employment

Industry of employment

Education & healthcare 19.5%

Manufacturing 18.2%

Professional & management 11.5%

Construction 9.8%

Retail trade 9.8%

Arts, food & hospitality 8.9%

Finance & real estate 7.1%

Transportation & utilities 3.9%

Information 3.3%

Wholesale trade 2.8%

Other services 2.5%

Public administration 2.2%

Agriculture & mining 0.4%

Occupation

Category	%
Management, business & arts	39.5%
Service	15.8%
Sales & office	21.8%
Natural resources & construction	11.7%
Production & transportation	11.4%

Employment type

Type	%
Private sector	85.9%
Government	8.3%
Self-employed	5.8%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	80.0%
Carpool	3.2%
Public transit	0.0%
Walk	0.8%
Work from home	16.0%
Other means	0.0%
Avg commute (minutes)	34.6

Poverty

All people 10.3%

Under 18 years 20.6%

18 and over 7.2%

Married-couple families 0.0%

Female-led households 70.8%

Income support

Source	% of households
Social Security	35.4%
Retirement income	24.8%
Supplemental Security	3.1%
Cash public assistance	1.5%
Food stamps / SNAP	1.5%

Health indicators

Condition	%
Obesity	30.8%
High blood pressure	28.1%
High cholesterol	30.0%
Diabetes	7.3%
Heart disease	4.6%
Stroke	2.1%
Asthma	10.2%
Arthritis	21.4%
Kidney disease	2.1%
Pulmonary disease	5.4%
Cancer	5.8%

Behavior / access	%
Smoking	16.3%
Binge drinking	20.1%
No physical activity	16.7%
Less than 7 hrs sleep	30.8%
Depression	21.0%
Fair or poor health	10.4%
Poor mental health	14.9%
Poor physical health	9.2%
No health insurance	9.6%
Visited doctor (checkup)	71.3%
Visited dentist	72.9%
Cholesterol screening	90.7%
Teeth loss	10.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	255	5.1%

Disability	%
Any disability	12.4%
Under 18	2.1%
18–64 years	10.8%
65 and over	43.1%

Health insurance coverage

Type	%
Private insurance	75.7%
Public insurance	29.7%
No insurance	8.0%
Uninsured under 19	8.2%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	6,132	93.8%
Spanish	33	0.5%
Other Indo-European	23	0.4%
Asian & Pacific Islander	1	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	6,259	95.8%
Born in same state	6,199	94.8%
Born in different state	1,538	23.5%
Foreign born	60	0.9%
Naturalized citizen	277	4.2%
Not a US citizen	152	54.9%

Ancestry

Ancestry	Count	%
Italian	1,619	24.8%
French	1,041	15.9%
Arab	598	9.1%

Ancestry	Count	%
German	544	8.3%
English	1	0%

Technology access

Metric	% of households
Computer access	33.8%
Internet access	98.6%

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

Frequently asked questions about ZIP code 03873

What city is ZIP code 03873 in?

ZIP code 03873 is primarily assigned to Sandown, New Hampshire.

What county is ZIP code 03873 in?

ZIP code 03873 falls within Rockingham County, New Hampshire.

Is ZIP code 03873 mostly owner-occupied?

85% of occupied units in ZIP code 03873 are owner-occupied, well above the national average.

What is the median household income in ZIP code 03873?

The median household income in ZIP code 03873 is $125,888, above the national median of ~$75,000.

What is the typical home value in ZIP code 03873?

The median home value in ZIP code 03873 is $374,800.

Does ZIP code 03873 have a large retiree population?

35% of households in ZIP code 03873 receive Social Security income, suggesting a significant retiree or disability population.

What timezone is ZIP code 03873 in?

ZIP code 03873 observes the EST timezone.