03837 ZIP Code, Gilmanton Iron Works, NH
03837 is a ZIP code in Gilmanton Iron Works, New Hampshire in Belknap County. It covers 20 square miles of land. The closest ZIP codes are 03237, 03225 and 03810. 1,451 people live here in 602 households. It is rural, with fewer than 100 people per square mile, and most homes are owner-occupied (100%). Median household income is $119,712, above the New Hampshire median of $99,031; the median age is 55.1, older than most ZIP codes.
Quick facts
- Mailing city: Gilmanton Iron Works, NH
- County: Belknap County
- Land area: 20 sq mi
- Population: 1,451
- Median household income: $119,712
Key figures
| Measure | Value |
|---|---|
| Residents | 1,451 |
| Households | 602 |
| Median household income | $119,712 |
| Income per person | $54,328 |
| Median age | 55.1 |
| Homeowners | 99.7% |
| Median home value | $409,600 |
| Median rent | not published |
| Bachelor's degree or higher | 41.1% |
| Average commute (minutes) | 32.8 |
| Households with kids under 18 | 23.4% |
| Moved in the past year | 15.3% |
| Below the poverty line | 1.5% |
| Broadband internet | 85.5% |
| Speak a non-English language at home | 4.1% |
Household income
| % of households | Value |
|---|---|
| <$10K | 3.7% |
| $10–15K | 0.0% |
| $15–25K | 0.3% |
| $25–35K | 2.3% |
| $35–50K | 4.8% |
| $50–75K | 10.1% |
| $75–100K | 10.0% |
| $100–150K | 31.9% |
| $150–200K | 20.3% |
| $200K+ | 16.6% |
Age
| % of all residents | Value |
|---|---|
| <10 | 4.3% |
| 10–19 | 15.3% |
| 20–24 | 1.8% |
| 25–34 | 10.4% |
| 35–44 | 13.4% |
| 45–54 | 4.5% |
| 55–64 | 28.7% |
| 65–74 | 12.3% |
| 75+ | 9.2% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 51.5% |
| Owned outright | 11.5% |
| Rented | 0.2% |
| Vacant | 36.8% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 95.1% |
| Townhome | 0.0% |
| 2–4 units | 0.2% |
| 5–19 units | 0.0% |
| 20+ units | 0.0% |
| Mobile / other | 4.7% |
Businesses in 03837
24 business establishments with 71 employees (ZIP Codes Business Patterns 2023).
- Construction: 7
- Professional, Scientific, and Technical Services: 4
- Accommodation and Food Services: 4
- Other Services (except Public Administration): 4
EDDM carrier routes
See every USPS carrier route in 03837 with residential and business mailbox counts on the route map. Open the EDDM route map.
Nearby ZIP codes
- 03237 (2.7 mi)
- 03225 (6.2 mi)
- 03810 — Alton CDP, NH (6.6 mi)
- 03218 (6.7 mi)
- 03249 (7 mi)
- 03809 — Alton CDP, NH (7.4 mi)
- 03220 — Belmont CDP, NH (8.2 mi)
- 03307 — Loudon CDP, NH (8.2 mi)
Areas that include 03837
- Gilmanton Iron Works, NH ZIP codes — 1 ZIP code
- Belknap County ZIP codes — 14 ZIP codes
- New Hampshire ZIP code data
Where it ranks
- No. 2 of 14: highest median household income in Belknap County
- No. 1 of 14: highest share of owner-occupied homes in Belknap County
- No. 2 of 14: highest share of residents who moved in during the past year in Belknap County
- No. 4 of 14: highest median age in Belknap County
Mail every home in 03837
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 03837, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 03837 in?
- 03837 is a Gilmanton Iron Works, NH mailing address. None of its land lies inside a Census-defined city or community.
- What county is 03837 in?
- 03837 is in Belknap County.
- What is the population of 03837?
- About 1,451 people (±459), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 1,471.
- What is the median household income in 03837?
- $119,712 (±$14,441), compared with $99,031 for New Hampshire as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 03837?
- EDDM2GO's stored route library does not include 03837 yet. The EDDM route map loads its carrier routes and mailbox counts when you search the ZIP code.
- What ZIP codes are near 03837?
- The closest, measured center to center: 03237 (2.7 mi), 03225 (6.2 mi), 03810 (6.6 mi, Alton), 03218 (6.7 mi), 03249 (7 mi) and 03809 (7.4 mi, Alton).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.