PlainZIP

Gilmanton, NH · standard

ZIP Code 03237

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

2,254
24/sq mi
$111,359
Median income
$345,400
Median home value
36.1%
Bachelor's or higher

The verdict

Gilmanton pairs an upper-quartile household income with above-median home values, in a rural, homeowner-dominated area.

Top 13%
household income, US ZIPs
Top 27%
home value, US ZIPs
24
people per sq mi
99%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 03237 against every reporting US ZIP.

ZIP code 03237 covers 95.9 square miles in Gilmanton, Belknap County, New Hampshire (a standard USPS delivery area), with a modest 2,254 residents on file, a density of 24 people per square mile, in the New York time zone.

ZIP 03237 skews affluent, with a median household income of $111,359 (9% above the New Hampshire average), while per-capita income is $52,479. The poverty rate stands at 5.4% and the unemployment rate at 7.4%. On housing, the median home value is $345,400 (15% below the state average) with median rent at - per month, and 98.9% of occupied units are owner-occupied.

A solid share of residents have a four-year degree: 36.1% of adults hold a bachelor's degree or higher, the median age is 43.2, and the average commute is -. We also surface 9 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Belknap County, so you can benchmark 03237 against its immediate geography rather than a national average 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 03237

Top 5 sectors by establishment count in Gilmanton, NH

Which industries have the most business establishments in ZIP 03237.

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 03237, Gilmanton, 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

2,254

Population

95.9

Area (sq mi)

24

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 03237?

43.2

Median Age

51.6%

Male

48.4%

Female

2.9%

Foreign-Born

White 95.8%
African American 0.0%
Asian 0.0%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 4.2%
Hispanic or Latino 2.4%

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?

$111,359

Median Household Income

+9% vs state

$52,479

Per Capita Income

5.4%

Poverty Rate

7.4%

Unemployment Rate

How ZIP 03237 ranks nationally

Gilmanton, NH household income vs. every US ZIP code

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

$111,359 Top 13% higher than 87% 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 60.4%
Bachelor's Degree or Higher 36.1%

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

What does housing look like?

1,390

Total Housing Units

1,097

Occupied Units

293

Vacant Units

2.35

Avg Household Size

Occupancy Type

Owner 98.9%
Renter 1.1%

$345,400

Median Home Value

-15% vs state

1978

Median Year Built

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

What businesses operate in this ZIP?

Census Bureau data shows 40 business establishments in ZIP 03237, employing approximately 117 people with a combined annual payroll of $7,377,000.

40

Businesses

117

Employees

$7.4M

Annual Payroll

4

Industry Sectors

Industry Establishments % of Total
Construction 17 42.5%
Administrative and support and waste management and remediation services 6 15.0%
Retail trade 3 7.5%
Real estate and rental and leasing 3 7.5%

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 03237 vs 03837 →

ZIP 03237 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 03237 ranks #7 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 03237 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 03237 ranks #6 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
03837 Gilmanton Iron Works, NH 1,519 2.7 mi
03220 Belmont, NH 7,430 5.4 mi
03249 Gilford, NH 7,113 8.9 mi
03307 Loudon, NH 5,334 7.8 mi
03218 Barnstead, NH 960 8.1 mi
03810 Alton Bay, NH 1,538 8.4 mi
03263 Pittsfield, NH 4,114 10.0 mi
03225 Center Barnstead, NH 3,660 8.7 mi
03246 Laconia, NH 15,963 11.0 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, NH New Hampshire

Frequently Asked Questions

What county is ZIP code 03237 in? ▼
ZIP code 03237 (Gilmanton) 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 03237? ▼
ZIP code 03237 in Gilmanton, NH has a population of 2,254 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 03237? ▼
The median household income in ZIP 03237 is $111,359, which is 46% above the national average of $76,288.
What is the average home value in ZIP 03237? ▼
The median home value in ZIP 03237 is $345,400, which is 24% above the national average of $278,155.
What is the demographic makeup of ZIP 03237? ▼
The largest racial group in ZIP 03237 is White at 95.8%. Hispanic or Latino residents make up 2.4% of the population.
How many businesses are in ZIP code 03237? ▼
ZIP code 03237 has 40 business establishments employing approximately 117 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 03237? ▼
The top industries by establishment count in ZIP 03237 are: Construction (17), Administrative and support and waste management and remediation services (6), Retail trade (3). There are 4 industry sectors represented in total.
What is the education level in ZIP code 03237? ▼
In ZIP code 03237, 60.4% of residents aged 25+ have a high school diploma or higher, and 36.1% 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 03237? ▼
In ZIP code 03237, approximately 98.9% of occupied housing units are owner-occupied and 1.1% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 03237? ▼
The poverty rate in ZIP code 03237 is 5.4% 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.