Alton ZIP Codes — Belknap County, NH

There is one unique ZIP code in Alton, New Hampshire and it is 03809. Area code: 603.

ZIP codes

40.08

sq mi land

0.84

sq mi water

603

area code

Alton, NH ZIP code map

About Alton, NH

Alton is a picturesque town located in New Hampshire, nestled within the beautiful Belknap County. This charming locality is known for its stunning natural landscapes and vibrant community spirit. With a rich blend of history and outdoor recreation, Alton offers residents and visitors alike a taste of New England living.

Location & geography

Alton is strategically located in the central part of New Hampshire, making it accessible to various neighboring towns and cities. It is approximately 12 miles from Laconia, 18 miles from Concord, and around 20 miles from Manchester. The town spans a land area of 40.08 square miles, with an additional 0.84 square miles covered by water, featuring beautiful lakes and scenic terrain.

Community & economy

The community in Alton is characterized by its friendly atmosphere and active participation in local events. The town is primarily supported by industries such as tourism, retail, and agriculture, which thrive due to its natural attractions. Daily life in Alton revolves around outdoor activities, community gatherings, and a shared appreciation for the stunning landscapes that surround them.

Transportation

Alton is served by several major highways, including New Hampshire Route 11, which facilitates easy travel in and out of the town. The nearest major airport is Manchester-Boston Regional Airport, located about 20 miles south of Alton. Public transportation options are limited, so most residents rely on personal vehicles for their commute.

History

Alton was founded in the early 18th century and has a rich history tied to early settlers and the region's development. Key industries in its early years included agriculture and lumber, which laid the groundwork for its community. Noteworthy events include the establishment of the Alton Bay Railroad, which played a vital role in the town's tourism boom in the late 19th century.

Did you know?

One surprising fact about Alton is that it is home to a portion of Lake Winnipesaukee, the largest lake in New Hampshire, which attracts numerous tourists every year. Additionally, the town features beautiful hiking trails and outdoor attractions that make it a popular destination for nature enthusiasts.

ZIP codes for Alton, NH (1)

ZIP code	City	County	Map
03809	Alton	Belknap	View map

Demographics & statistics

3,617

Population

47.0

Median age

$86,116

Median household income

$39,480

Per capita income

$279,500

Median home value

$577

Median monthly rent

89.0%

Home ownership

5.4%

Poverty rate

3.4%

Unemployment

1,621

Housing units

24.4%

Bachelor's or higher

Age distribution

Male Female

102

Under 5

130

5–9

119

10–14

15–19

105

20–24

217

25–34

199

174

35–44

160

202

45–54

186

282

55–59

260

124

60–64

114

192

65–74

177

159

75–84

146

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	679	18.8%
18 and over	2,938	81.2%
65 and over	722	20.0%
Median age	47.0 years

Race & ethnicity

White 96.5%

Two or more races 1.5%

Hispanic or Latino 1.3%

Asian 0.3%

Native Hawaiian / Pacific Islander 0.3%

Group	Count	%
White	3,537	96.5%
Two or more races	56	1.5%
Hispanic or Latino	49	1.3%
Asian	12	0.3%
Native Hawaiian / Pacific Islander	12	0.3%

Household income

Under $10k 3.6%

$10k–$15k 1.1%

$15k–$25k 3.9%

$25k–$35k 5.3%

$35k–$50k 14.5%

$50k–$75k 15.3%

$75k–$100k 11.0%

$100k–$150k 21.0%

$150k–$200k 15.4%

$200k+ 9.0%

Range	% of households
Under $10k	3.6%
$10k–$15k	1.1%
$15k–$25k	3.9%
$25k–$35k	5.3%
$35k–$50k	14.5%
$50k–$75k	15.3%
$75k–$100k	11.0%
$100k–$150k	21.0%
$150k–$200k	15.4%
$200k+	9.0%
Median income	$86,116

Housing

Home values

Under $50k 0.7%

$50k–$100k 7.3%

$100k–$150k 5.2%

$150k–$200k 12.6%

$200k–$300k 29.9%

$300k–$500k 30.9%

$500k–$1M 11.2%

$1M+ 2.1%

Housing overview

Metric	Value
Median home value	$279,500
Median rent / month	$577
Owner occupied	89.0%
Renter occupied	11.0%
Vacant	23.7%
Single-family detached	81.5%
Large apartment buildings	0.6%
Mobile homes	11.8%
Median rooms	5.8
Avg household size (owned)	2.82

Year built

Era	%
2020 or later	0.8%
2010–2019	11.0%
2000–2009	18.1%
1990–1999	12.0%
1980–1989	12.4%
1970–1979	10.7%
1960–1969	19.7%
1950–1959	3.4%
1940–1949	0.9%
1939 or earlier	10.9%

Bedrooms

Size	% of units
No bedroom (studio)	3.7%
1 bedroom	7.9%
2 bedrooms	24.9%
3 bedrooms	46.4%
4 bedrooms	11.0%
5+ bedrooms	6.2%

Vehicles per household

Vehicles	% of households
No vehicle	1.2%
1 vehicle	22.2%
2 vehicles	49.6%
3 or more	27.0%

Heating fuel

Fuel type	%
Utility gas	3.0%
Electricity	2.9%
Propane / LP gas	18.2%
Fuel oil	66.3%
Wood	7.3%

Households & families

Household type	Count	%
Married-couple family	980	72.6%
Cohabiting couple	47	3.5%
Male householder, no spouse	145	10.7%
Female householder, no spouse	178	13.2%
Households with children under 18	330	24.4%
Households with seniors (65+)	470	34.8%
Average household size	2.68

Marital status

Status	Male	Female
Never married	27.3%	25.3%
Married	65.4%	64.5%
Separated	0.0%	0.0%
Widowed	4.9%	7.1%
Divorced	2.4%	3.0%

Education

Less than 9th grade 0.4%

Some HS, no diploma 5.5%

HS graduate 31.8%

Some college, no degree 21.3%

Associate's degree 16.6%

Bachelor's degree 13.5%

Graduate / professional 10.9%

Metric	%
HS diploma or higher	94.1%
Bachelor's or higher	24.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	139	18.8%
Kindergarten	0	0.0%
Elementary school	366	49.5%
High school	141	19.1%
College / grad school	93	12.6%

Employment

Industry of employment

Education & healthcare 24.2%

Retail trade 14.3%

Manufacturing 12.6%

Arts, food & hospitality 11.2%

Finance & real estate 9.5%

Construction 7.9%

Other services 6.6%

Professional & management 4.4%

Transportation & utilities 3.9%

Public administration 3.0%

Wholesale trade 2.3%

Occupation

Category	%
Management, business & arts	40.2%
Service	16.2%
Sales & office	25.8%
Natural resources & construction	8.8%
Production & transportation	9.1%

Employment type

Type	%
Private sector	81.9%
Government	12.6%
Self-employed	5.5%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	73.7%
Carpool	15.3%
Public transit	0.0%
Walk	1.1%
Other means	0.0%
Avg commute (minutes)	36.8

Poverty

All people 5.4%

Under 18 years 0.0%

18 and over 6.6%

Married-couple families 4.8%

Female-led households 0.0%

Income support

Source	% of households
Social Security	33.9%
Retirement income	45.9%
Supplemental Security	1.3%
Cash public assistance	1.9%
Food stamps / SNAP	3.0%

Health indicators

Condition	%
High blood pressure	31.6%
High cholesterol	32.9%
Heart disease	6.0%
Stroke	2.6%
Asthma	10.5%
Arthritis	26.0%
Kidney disease	2.5%
Pulmonary disease	6.4%
Cancer	7.3%

Behavior / access	%
Binge drinking	18.3%
No physical activity	19.7%
Less than 7 hrs sleep	30.4%
Fair or poor health	11.1%
Poor mental health	13.6%
Poor physical health	9.6%
No health insurance	9.9%
Visited doctor (checkup)	72.0%
Visited dentist	69.5%
Cholesterol screening	92.0%
Teeth loss	10.2%

Veterans & disability

Veterans	Count	%
Civilian veterans	369	12.6%

Disability	%
Any disability	12.3%
Under 18	0.0%
18–64 years	8.5%
65 and over	35.5%

Health insurance coverage

Type	%
Private insurance	82.8%
Public insurance	28.6%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	3,422	94.6%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	3,530	97.6%
Born in same state	3,503	96.8%
Born in different state	1,897	52.4%
Foreign born	27	0.7%
Naturalized citizen	87	2.4%
Not a US citizen	70	80.5%

Ancestry

Ancestry	Count	%
Italian	766	21.2%
French	706	19.5%
German	214	5.9%
Polish	101	2.8%

Ancestry	Count	%
Arab	70	1.9%
English	62	1.7%
Norwegian	45	1.2%

Technology access

Metric	% of households
Computer access	37.3%
Internet access	92.3%

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

Frequently asked questions

What ZIP codes does Alton, NH have?

Alton, NH has one ZIP code: 03809. Each ZIP code serves a distinct delivery area within the city and surrounding region.