03810 ZIP Code — Alton Bay, NH

Belknap County, New Hampshire

ZIP code 03810 is located in Alton Bay, New Hampshire, within Belknap County. It covers approximately 23.58 square miles and serves a population of 2,286 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 603.

About ZIP code 03810

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $511,500. Owner-occupancy is high at 98%, well above the national average.

The gap between median ($139,848) and mean household income suggests income inequality — a small number of higher earners pull the average up. 40% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with arts, entertainment, and food service as the leading industry. The average commute of 35 minutes is near the national average.

Educational attainment is near the national average, with 37% of residents holding a bachelor's degree or higher.

Notable community characteristics include a notable veteran presence at 14% of civilians, above the national average of 7%.

Overall, ZIP code 03810 reflects a community defined by a strong veteran community, high homeownership, and a significant Social Security-dependent population.

2,286

population

23.58

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

03810 ZIP code map

Cities in ZIP code 03810

Below are the cities the US Postal Service accepts for ZIP code 03810. Using any city not on this list may result in mail delivery delays.

City	Status
Alton Bay	Acceptable
Alton Bay	Preferred

Nearby ZIP codes

03809 Alton (3 mi) 03837 Gilmanton Iron Works (6.2 mi) 03855 New Durham (7.1 mi) 03237 Gilmanton (7.9 mi) 03894 Wolfeboro (8.3 mi) 03853 Mirror Lake (9.3 mi) 03220 Belmont (10.3 mi) 03225 Center Barnstead (10.3 mi) 03887 Union (11.2 mi) 03246 Laconia (11.2 mi) 03253 Meredith (12.8 mi) 03872 Sanbornville (13 mi)

Demographics updated 05/2026

Population
Total population	2,286
Population density	97 / sq mi
State FIPS	33
County FIPS	001

Geography
Land area	23.58 sq mi
Water area	18.64 sq mi
Latitude	43.5059
Longitude	-71.2742
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	21.5%	36.9%	31.0%
$50k – $100k	34.4%	31.7%	31.2%
$100k – $200k	34.0%	25.5%	28.1%
Over $200k	10.0%	5.9%	9.7%

Demographics & statistics

2,286

Population

People per sq mi

54.2

Median age

$139,848

Median household income

$73,144

Per capita income

$511,500

Median home value

Median monthly rent

97.8%

Home ownership

1.8%

Poverty rate

1.2%

Unemployment

2,448

Housing units

36.5%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

111

100

20–24

127

35–44

214

45–54

271

135

55–59

172

60–64

103

147

65–74

185

75–84

106

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	271	11.9%
18 and over	2,015	88.1%
65 and over	607	26.6%
Median age	54.2 years

Race & ethnicity

White 92.4%

Two or more races 5.2%

Hispanic or Latino 1.3%

Black or African American 1.1%

Group	Count	%
White	2,139	92.4%
Two or more races	120	5.2%
Hispanic or Latino	29	1.3%
Black or African American	26	1.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	21.5%	36.9%	31.0%
$50k – $100k	34.4%	31.7%	31.2%
$100k – $200k	34.0%	25.5%	28.1%
Over $200k	10.0%	5.9%	9.7%

$25k–$35k 11.3%

$35k–$50k 3.3%

$50k–$75k 3.8%

$75k–$100k 6.0%

$100k–$150k 35.4%

$150k–$200k 6.5%

$200k+ 33.7%

Range	% of households
$25k–$35k	11.3%
$35k–$50k	3.3%
$50k–$75k	3.8%
$75k–$100k	6.0%
$100k–$150k	35.4%
$150k–$200k	6.5%
$200k+	33.7%
Median income	$139,848

Housing

Home values

$150k–$200k 0.6%

$200k–$300k 16.1%

$300k–$500k 32.5%

$500k–$1M 35.1%

$1M+ 15.7%

Housing overview

Metric	Value
Median home value	$511,500
Median rent / month	$0
Owner occupied	97.8%
Renter occupied	2.2%
Vacant	63.9%
Single-family detached	93.4%
Large apartment buildings	0.0%
Mobile homes	1.8%
Median rooms	5.2
Avg household size (owned)	2.60

Year built

Era	%
2020 or later	0.0%
2010–2019	7.3%
2000–2009	13.8%
1990–1999	12.7%
1980–1989	8.1%
1970–1979	17.1%
1960–1969	12.4%
1950–1959	10.7%
1940–1949	4.3%
1939 or earlier	13.7%

Bedrooms

Size	% of units
No bedroom (studio)	3.4%
1 bedroom	2.8%
2 bedrooms	35.7%
3 bedrooms	40.0%
4 bedrooms	9.1%
5+ bedrooms	9.1%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	4.4%
2 vehicles	39.1%
3 or more	56.5%

Heating fuel

Fuel type	%
Utility gas	1.9%
Electricity	0.7%
Propane / LP gas	20.2%
Fuel oil	63.7%
Wood	13.5%

Households & families

Household type	Count	%
Married-couple family	607	68.2%
Cohabiting couple	66	7.4%
Male householder, no spouse	72	8.1%
Female householder, no spouse	145	16.3%
Households with children under 18	220	24.7%
Households with seniors (65+)	383	43.0%
Average household size	2.56

Marital status

Status	Male	Female
Never married	18.2%	29.6%
Married	66.2%	50.3%
Separated	0.0%	0.0%
Widowed	10.0%	6.1%
Divorced	5.5%	14.0%

Education

Less than 9th grade 0.0%

Some HS, no diploma 1.9%

HS graduate 29.4%

Some college, no degree 12.7%

Associate's degree 19.5%

Bachelor's degree 28.4%

Graduate / professional 8.1%

Metric	%
HS diploma or higher	98.1%
Bachelor's or higher	36.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	0	0.0%
Elementary school	122	32.7%
High school	198	53.1%
College / grad school	53	14.2%

Employment

Industry of employment

Arts, food & hospitality 21.8%

Retail trade 21.3%

Education & healthcare 17.6%

Construction 12.1%

Finance & real estate 10.6%

Professional & management 8.8%

Public administration 3.0%

Other services 2.7%

Transportation & utilities 1.9%

Occupation

Category	%
Management, business & arts	45.9%
Service	30.4%
Sales & office	14.6%
Natural resources & construction	5.6%
Production & transportation	3.6%

Employment type

Type	%
Private sector	72.4%
Government	7.3%
Self-employed	19.2%
Unpaid family workers	1.2%

Commute

Method	%
Drive alone	73.1%
Carpool	9.8%
Public transit	0.0%
Walk	0.0%
Work from home	15.3%
Other means	1.8%
Avg commute (minutes)	34.5

Poverty

All people 1.8%

Under 18 years 0.0%

18 and over 2.1%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	40.4%
Retirement income	19.8%
Supplemental Security	7.1%
Cash public assistance	3.7%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
Obesity	33.8%
High blood pressure	35.0%
High cholesterol	37.1%
Diabetes	9.9%
Heart disease	7.0%
Stroke	2.9%
Asthma	10.3%
Arthritis	28.6%
Kidney disease	2.8%
Pulmonary disease	7.0%
Cancer	8.3%

Behavior / access	%
Smoking	14.8%
Binge drinking	16.7%
No physical activity	20.3%
Less than 7 hrs sleep	29.8%
Depression	19.7%
Fair or poor health	11.7%
Poor mental health	12.8%
Poor physical health	10.1%
No health insurance	9.7%
Visited doctor (checkup)	73.9%
Visited dentist	69.9%
Cholesterol screening	93.3%
Teeth loss	10.0%

Veterans & disability

Veterans	Count	%
Civilian veterans	284	14.1%

Disability	%
Any disability	9.7%
Under 18	0.0%
18–64 years	6.6%
65 and over	21.3%

Health insurance coverage

Type	%
Private insurance	78.6%
Public insurance	34.0%
No insurance	2.9%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	2,274	99.5%
Spanish	14	0.6%
Other Indo-European	0	0.0%
Asian & Pacific Islander	14	0.6%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	2,278	99.7%
Born in same state	2,104	92.0%
Born in different state	972	42.5%
Foreign born	174	7.6%
Naturalized citizen	8	0.3%
Not a US citizen	8	100.0%

Ancestry

Ancestry	Count	%
Italian	351	15.4%
French	215	9.4%
Arab	99	4.3%
German	73	3.2%

Ancestry	Count	%
English	35	1.5%
Polish	17	0.7%
Norwegian	11	0.5%

Technology access

Metric	% of households
Computer access	38.9%
Internet access	100.0%

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

Frequently asked questions about ZIP code 03810

What city is ZIP code 03810 in?

ZIP code 03810 is primarily assigned to Alton Bay, New Hampshire.

What county is ZIP code 03810 in?

ZIP code 03810 falls within Belknap County, New Hampshire.

Is ZIP code 03810 mostly owner-occupied?

98% of occupied units in ZIP code 03810 are owner-occupied, well above the national average.

Does ZIP code 03810 have an older population?

27% of residents in ZIP code 03810 are 65 or older, above the national average of ~17%.

Does ZIP code 03810 have a large retiree population?

40% of households in ZIP code 03810 receive Social Security income, suggesting a significant retiree or disability population.

Does ZIP code 03810 have a large veteran population?

14% of civilians in ZIP code 03810 are veterans, above the national average of ~7%.

What timezone is ZIP code 03810 in?

ZIP code 03810 observes the EST timezone.