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Gilmanton Iron Works ZIP Code List — Belknap County, NH

There is one unique ZIP code in Gilmanton Iron Works, New Hampshire and it is 03837. Area code: 603.
1
ZIP codes
19.97
sq mi land
0.67
sq mi water
603
area code
Gilmanton Iron Works, NH ZIP code map

About Gilmanton Iron Works, NH

Gilmanton Iron Works is a quaint, picturesque village located in the state of New Hampshire. Nestled in Belknap County, this charming community offers a serene environment, making it ideal for those seeking a peaceful lifestyle. Known for its natural beauty and friendly atmosphere, Gilmanton Iron Works serves as a hidden gem for residents and visitors alike.

Location & geography

Gilmanton Iron Works is situated in the central part of New Hampshire, approximately 10 miles from the larger town of Laconia and about 15 miles from Concord, the state capital. The area encompasses a total land area of 19.97 square miles, with an additional 0.67 square miles of water, showcasing its beautiful landscapes. The terrain is primarily rural, characterized by scenic views, hills, and numerous bodies of water that enhance the local ecology.

Community & economy

The community of Gilmanton Iron Works is tightly knit, with a strong emphasis on local living and sustainability. It is a place where many residents engage in activities such as farming, crafting, and fishing, contributing to a vibrant self-sustaining culture. Daily life here is filled with community events and access to outdoor recreational activities, allowing residents to enjoy the natural surroundings.

Transportation

Transportation in Gilmanton Iron Works is primarily facilitated by New Hampshire Route 140, which connects to surrounding towns and cities. The nearest major airport is the Manchester-Boston Regional Airport, located about 40 miles away, providing essential flights for both business and leisure travelers. Public transit options are limited, emphasizing the area's rural character and encouraging a reliance on personal vehicles.

History

Gilmanton Iron Works was founded in the early 19th century and played a significant role in the iron industry during its early days. Over the years, it has transitioned from an industrial center to a residential area, attracting those who appreciate its historical significance and natural beauty. The village has maintained a strong sense of community and tradition, reflected in its ongoing preservation efforts and local events.

Did you know?

One surprising fact about Gilmanton Iron Works is that it features proximity to the beautiful Lake Waukewan, a favorite spot among fishing and boating enthusiasts. Additionally, the village is recognized for its charming antique shops and historic buildings that offer a glimpse into its rich history.

ZIP codes for Gilmanton Iron Works, NH (1)
ZIP code City County Map
03837 Gilmanton Iron Works Belknap View map

Demographics & statistics

1,622
Population
46.9
Median age
$110,562
Median household income
$44,691
Per capita income
$319,600
Median home value
$0
Median monthly rent
94.2%
Home ownership
16.5%
Poverty rate
1.2%
Unemployment
892
Housing units
37.3%
Bachelor's or higher

Age distribution

Male Female
76
Under 5
61
12
5–9
9
79
10–14
64
5
15–19
4
18
20–24
15
119
25–34
96
116
35–44
93
86
45–54
70
81
55–59
66
138
60–64
111
73
65–74
59
64
75–84
52
30
85+
25
← Male
Female →

Age summary

GroupCount%
Under 1830919.1%
18 and over1,31380.9%
65 and over30318.7%
Median age46.9 years

Race & ethnicity

White 97.5%
Black or African American 2.1%
Two or more races 0.4%
GroupCount%
White1,58297.5%
Black or African American342.1%
Two or more races60.4%

Household income

Under $10k 4.6%
$10k–$15k 5.4%
$15k–$25k 9.7%
$25k–$35k 3.2%
$35k–$50k 2.2%
$50k–$75k 9.7%
$75k–$100k 10.6%
$100k–$150k 32.9%
$150k–$200k 11.2%
$200k+ 10.6%
Range% of households
Under $10k4.6%
$10k–$15k5.4%
$15k–$25k9.7%
$25k–$35k3.2%
$35k–$50k2.2%
$50k–$75k9.7%
$75k–$100k10.6%
$100k–$150k32.9%
$150k–$200k11.2%
$200k+10.6%
Median income$110,562

Housing

Home values

Under $50k 4.0%
$150k–$200k 2.9%
$200k–$300k 38.3%
$300k–$500k 46.3%
$500k–$1M 8.5%

Housing overview

MetricValue
Median home value$319,600
Median rent / month$0
Owner occupied94.2%
Renter occupied5.8%
Vacant26.0%
Single-family detached95.8%
Large apartment buildings0.0%
Mobile homes0.0%
Median rooms5.9
Avg household size (owned)2.38

Year built

Era%
2020 or later0.0%
2010–20192.6%
2000–200923.2%
1990–199913.9%
1980–198914.1%
1970–197911.8%
1960–19692.0%
1950–19595.9%
1940–19491.3%
1939 or earlier25.2%

Bedrooms

Size% of units
No bedroom (studio)2.6%
1 bedroom4.3%
2 bedrooms21.1%
3 bedrooms60.8%
4 bedrooms5.8%
5+ bedrooms5.4%

Vehicles per household

Vehicles% of households
No vehicle0.0%
1 vehicle27.5%
2 vehicles39.0%
3 or more33.5%

Heating fuel

Fuel type%
Electricity1.6%
Propane / LP gas17.0%
Fuel oil59.1%
Wood18.1%

Households & families

Household typeCount%
Married-couple family35751.7%
Cohabiting couple00.0%
Male householder, no spouse21130.6%
Female householder, no spouse12217.7%
Households with children under 1817124.8%
Households with seniors (65+)25737.2%
Average household size2.35

Marital status

StatusMaleFemale
Never married9.8%9.7%
Married63.7%63.6%
Separated0.0%1.3%
Widowed7.6%9.2%
Divorced18.8%16.2%

Education

Less than 9th grade 5.0%
Some HS, no diploma 2.6%
HS graduate 19.0%
Some college, no degree 24.2%
Associate's degree 11.9%
Bachelor's degree 22.0%
Graduate / professional 15.2%
Metric%
HS diploma or higher92.4%
Bachelor's or higher37.3%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool4720.3%
Kindergarten00.0%
Elementary school16470.7%
High school83.4%
College / grad school135.6%

Employment

Industry of employment

Education & healthcare 31.8%
Professional & management 14.2%
Manufacturing 13.1%
Wholesale trade 9.8%
Retail trade 6.8%
Public administration 6.0%
Construction 5.8%
Arts, food & hospitality 4.5%
Other services 4.2%
Information 2.0%
Transportation & utilities 1.9%

Occupation

Category%
Management, business & arts49.4%
Service13.5%
Sales & office24.8%
Natural resources & construction8.6%
Production & transportation3.8%

Employment type

Type%
Private sector72.2%
Government9.1%
Self-employed18.7%
Unpaid family workers0.0%

Commute

Method%
Drive alone82.2%
Carpool5.6%
Public transit0.0%
Walk2.0%
Other means0.0%
Avg commute (minutes)31.9

Poverty

All people 16.5%
Under 18 years 33.3%
18 and over 12.6%
Married-couple families 3.4%
Female-led households 68.6%

Income support

Source% of households
Social Security38.8%
Retirement income27.2%
Supplemental Security3.3%
Cash public assistance0.0%
Food stamps / SNAP8.4%

Health indicators

Condition%
High blood pressure30.4%
High cholesterol31.1%
Heart disease5.5%
Stroke2.5%
Asthma10.8%
Arthritis24.5%
Kidney disease2.4%
Pulmonary disease6.3%
Cancer6.3%
Behavior / access%
Binge drinking18.9%
No physical activity20.4%
Less than 7 hrs sleep31.6%
Fair or poor health11.6%
Poor mental health14.5%
Poor physical health9.8%
No health insurance10.3%
Visited doctor (checkup)70.9%
Visited dentist66.6%
Cholesterol screening90.9%
Teeth loss10.9%

Veterans & disability

VeteransCount%
Civilian veterans15211.6%
Disability%
Any disability11.3%
Under 180.0%
18–64 years9.9%
65 and over27.4%

Health insurance coverage

Type%
Private insurance83.0%
Public insurance29.8%
Uninsured under 193.9%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only1,48591.6%
Spanish412.8%
Other Indo-European00.0%
Asian & Pacific Islander412.8%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)1,52794.1%
Born in same state1,51193.2%
Born in different state56534.8%
Foreign born161.0%
Naturalized citizen955.9%
Not a US citizen4648.4%

Ancestry

AncestryCount%
French30318.7%
Italian25415.7%
German1579.7%
AncestryCount%
Arab1116.8%
English100.6%
Dutch90.6%

Technology access

Metric% of households
Computer access42.5%
Internet access95.2%

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

Frequently asked questions
What is the ZIP code for Gilmanton Iron Works, NH?
Gilmanton Iron Works, NH has one ZIP code: 03837.
What is the main ZIP code for Gilmanton Iron Works, NH?
The primary ZIP code for Gilmanton Iron Works, NH is 03837. The city uses area code 603 for phone service.
What county is Gilmanton Iron Works, NH in?
Gilmanton Iron Works is located in Belknap County, New Hampshire.
How many ZIP codes are in Gilmanton Iron Works, NH?
Gilmanton Iron Works, NH has 1 ZIP code.
What ZIP code should I use when mailing correspondence to businesses located in the Gilmanton Iron Works village center?
Correspondence to addresses in Gilmanton Iron Works village center should use ZIP code 03837, which covers the entire Gilmanton Iron Works area in Belknap County.
What is the ZIP code for the Gilmanton Iron Works area along Route 140?
Addresses along Route 140 in Gilmanton Iron Works are served by ZIP code 03837, which is the sole ZIP code for this community in New Hampshire.
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