PlainZIP

Gilmanton Iron Works, NH · standard

ZIP Code 03837

Belknap County, New Hampshire - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

1,519
29/sq mi
$119,712
Median income
$409,600
Median home value
41.1%
Bachelor's or higher

The verdict

Gilmanton Iron Works pairs a top-decile household income with upper-quartile home values, in a rural, homeowner-dominated area.

Top 10%
household income, US ZIPs
Top 20%
home value, US ZIPs
29
people per sq mi
100%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 03837 against every reporting US ZIP.

ZIP code 03837 covers 52.0 square miles in Gilmanton Iron Works, Belknap County, New Hampshire (a standard USPS delivery area), with a modest 1,519 residents on file, a density of 29 people per square mile, in the New York time zone.

ZIP 03837 skews affluent, with a median household income of $119,712 (17% above the New Hampshire average), while per-capita income is $54,328. 1.5% of residents live below the poverty line, and the unemployment rate reads 1.1%. Median home value sits at $409,600 (1% above the state average), median rent at - a month, and owner-occupancy at 99.7%.

A solid share of residents have a four-year degree: 41.1% of adults hold a bachelor's degree or higher, the median age is 55.1, and the average commute is -. Beyond these figures, 9 nearby ZIP codes within about 10 miles are surfaced below, along with 6 more sharing Belknap County, letting you compare 03837 to its immediate surroundings rather than a national baseline alone.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 03837

Top 5 sectors by establishment count in Gilmanton Iron Works, NH

Which industries have the most business establishments in ZIP 03837.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 03837, Gilmanton Iron Works, NH · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

1,519

Population

52.0

Area (sq mi)

29

People / sq mi

New York

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 03837?

55.1

Median Age

48.9%

Male

51.1%

Female

4.0%

Foreign-Born

White 96.8%
African American 1.8%
Asian 0.0%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 1.4%
Hispanic or Latino 0.0%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$119,712

Median Household Income

+17% vs state

$54,328

Per Capita Income

1.5%

Poverty Rate

1.1%

Unemployment Rate

How ZIP 03837 ranks nationally

Gilmanton Iron Works, NH household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$119,712 Top 10% higher than 90% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). This entry sits in this band. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 60.0%
Bachelor's Degree or Higher 41.1%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

956

Total Housing Units

602

Occupied Units

354

Vacant Units

2.41

Avg Household Size

Occupancy Type

Owner 99.7%
Renter 0.3%

$409,600

Median Home Value

+1% vs state

1987

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What businesses operate in this ZIP?

Census Bureau data shows 24 business establishments in ZIP 03837, employing approximately 71 people with a combined annual payroll of $3,553,000.

24

Businesses

71

Employees

$3.6M

Annual Payroll

4

Industry Sectors

Industry Establishments % of Total
Construction 7 29.2%
Professional, scientific, and technical services 4 16.7%
Accommodation and food services 4 16.7%
Other services (except public administration) 4 16.7%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 03837 vs 03237 →

ZIP 03837 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 03837 ranks #9 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 03837 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 03837 ranks #2 of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
03237 Gilmanton, NH 2,254 2.7 mi
03218 Barnstead, NH 960 6.3 mi
03263 Pittsfield, NH 4,114 8.8 mi
03809 Alton, NH 3,716 6.3 mi
03810 Alton Bay, NH 1,538 7.7 mi
03225 Center Barnstead, NH 3,660 6.3 mi
03220 Belmont, NH 7,430 8.0 mi
03249 Gilford, NH 7,113 9.8 mi
03307 Loudon, NH 5,334 8.8 mi

More ZIP Codes in Belknap County

03246 standard
Laconia, NH
Pop: 15,963
03220 standard
Belmont, NH
Pop: 7,430
03249 standard
Gilford, NH
Pop: 7,113
03253 standard
Meredith, NH
Pop: 6,219
03809 standard
Alton, NH
Pop: 3,716
03225 standard
Center Barnstead, NH
Pop: 3,660

Related Areas

Belknap County Gilmanton Iron Works, NH New Hampshire

Frequently Asked Questions

What county is ZIP code 03837 in? ▼
ZIP code 03837 (Gilmanton Iron Works) is located in Belknap County, New Hampshire. Belknap County contains multiple ZIP codes, see the full list at /counties/belknap-nh.
What is the population of ZIP code 03837? ▼
ZIP code 03837 in Gilmanton Iron Works, NH has a population of 1,519 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 03837? ▼
The median household income in ZIP 03837 is $119,712, which is 57% above the national average of $76,288.
What is the average home value in ZIP 03837? ▼
The median home value in ZIP 03837 is $409,600, which is 47% above the national average of $278,155.
What is the demographic makeup of ZIP 03837? ▼
The largest racial group in ZIP 03837 is White at 96.8%.
How many businesses are in ZIP code 03837? ▼
ZIP code 03837 has 24 business establishments employing approximately 71 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 03837? ▼
The top industries by establishment count in ZIP 03837 are: Construction (7), Professional, scientific, and technical services (4), Accommodation and food services (4). There are 4 industry sectors represented in total.
What is the education level in ZIP code 03837? ▼
In ZIP code 03837, 60.0% of residents aged 25+ have a high school diploma or higher, and 41.1% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 03837? ▼
In ZIP code 03837, approximately 99.7% of occupied housing units are owner-occupied and 0.3% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 03837? ▼
The poverty rate in ZIP code 03837 is 1.5% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.