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 Moderate-density area
- $119,712
- Median income Above-median income area
- $409,600
- Median home value Above-median home value
- 41.1%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
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 average New Hampshire ZIP), while per-capita income is $54,328. Both reported hardship measures are comparatively low in absolute terms: poverty is 1.5% and unemployment is 1.1%. Median home value is $409,600 (1% above the average New Hampshire ZIP); 99.7% of occupied homes are owner-occupied.
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 -. The page also surfaces 9 ZIP codes within roughly 10 miles and 6 more in Belknap County, so 03837 can be compared with both its immediate and county-level context.
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.
- Construction
Construction
7 establishments
- Professional, scientific, and technical services
Professional, scientific, and technical services
4 establishments
- Accommodation and food services
Accommodation and food services
4 establishments
- Other services (except public administration)
Other services (except public administration)
4 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, 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
Who lives in ZIP 03837?
55.1
Median Age
48.9%
Male
51.1%
Female
4.0%
Foreign-Born
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 ZIP avg
$54,328
Per Capita Income
1.5%
Poverty Rate
1.1%
Unemployment Rate
How ZIP 03837 ranks among New Hampshire ZIPs
Gilmanton Iron Works, NH household income vs. every New Hampshire ZIP code
Median household income among 236 reporting New Hampshire ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$119,712 Top 22% higher than 78% of 236 New Hampshire ZIPs
Each bar is a $20K-wide band; taller bars hold more New Hampshire 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?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
956housing units
956
Total Housing Units
602
Occupied Units
354
Vacant Units
2.41
Avg Household Size
Occupancy Type
$409,600
Median Home Value
+1% vs state ZIP avg
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.
- 03220
Belmont (03220)
7,430 residents
- 03249
Gilford (03249)
7,113 residents
- 03307
Loudon (03307)
5,334 residents
- 03263
Pittsfield (03263)
4,114 residents
- 03809
Alton (03809)
3,716 residents
- 03225
Center Barnstead (03225)
3,660 residents
- 03237 2,254
Gilmanton (03237)
2,254 residents
- 03810 1,538
Alton Bay (03810)
1,538 residents
- 03837 1,519
Gilmanton Iron Works (03837)
1,519 residents
What this shows Among its immediate neighbors, ZIP 03837 ranks #9 by population - useful context the national average alone can't give.
ZIP 03837 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 03810
Alton Bay (03810)
$148,261 median income
- 03837
Gilmanton Iron Works (03837)
$119,712 median income
- 03249
Gilford (03249)
$116,635 median income
- 03218
Barnstead (03218)
$112,500 median income
- 03225
Center Barnstead (03225)
$111,660 median income
- 03237
Gilmanton (03237)
$111,359 median income
- 03307
Loudon (03307)
$107,226 median income
- 03809
Alton (03809)
$106,397 median income
- 03263
Pittsfield (03263)
$74,318 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.
| 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 |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 03837, both outside NH so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (1,519 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Belknap County
Related Areas
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.
Related
Take this with you
What to do with ZIP 03837's numbers, next.
- See how ZIP 03837 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Gilmanton Iron Works, NH ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
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ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.