ZIP code 03837
Where is ZIP code 03837?
Gilmanton Iron Works, New Hampshire
Belknap County · Standard ZIP code
ZIP code 03837 belongs to Gilmanton Iron Works, New Hampshire in Belknap County. 03837 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Eastern Time zone and uses area code 603. About 1,451 people live in the 03837 area, where the median household income is $119,712. The closest ZIP codes are 03809 (Alton, 4.9 mi northeast), 03237 (Gilmanton, 5.3 mi west) and 03225 (Center Barnstead, 5.3 mi southeast).
| ZIP code | 03837 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Gilmanton Iron Works |
| Also accepted | Gilmanton Iw |
| State | New Hampshire (NH) |
| County | Belknap County |
| Time zone | Eastern Time · now |
| Area code | 603 |
| Coordinates | 43.4185, -71.3063 map |
| 3-digit prefix | 038 |
Population and income in 03837
| Population | 1,451 · lower than 70% of New Hampshire ZIP codes |
|---|---|
| People per square mile | 73 · lower than 59% of New Hampshire ZIP codes |
| Median age | 55.1 years · higher than 82% of New Hampshire ZIP codes |
| Men / women | 49% / 51% |
| Median household income | $119,712 · higher than 78% of New Hampshire ZIP codes |
| Income per person | $54,328 |
| Below the poverty line | 1.5% |
| Bachelor’s degree or higher | 41% of adults 25+ |
| Median home value | $409,600 · higher than 63% of New Hampshire ZIP codes |
| Housing units | 956 |
| Households | 602 (2.41 people on average) |
| Owners / renters | 100% / 0.3% |
| Land area | 19.97 sq mi (plus 0.67 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 03837. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 03837
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 03809 | Alton, NH | 4.9 mi NE | Standard |
| 03237 | Gilmanton, NH | 5.3 mi W | Standard |
| 03225 | Center Barnstead, NH | 5.3 mi SE | Standard |
| 03810 | Alton Bay, NH | 5.4 mi NE | Standard |
| 03218 | Barnstead, NH | 5.8 mi S | Standard |
| 03855 | New Durham, NH | 8.5 mi E | Standard |
| 03263 | Pittsfield, NH | 9.2 mi S | Standard |
| 03220 | Belmont, NH | 9.4 mi W | Standard |
| 03298 | Tilton, NH | 10.1 mi NW | Unique |
| 03299 | Tilton, NH | 10.1 mi NW | Unique |
| 03249 | Gilford, NH | 10.2 mi NW | Standard |
| 03307 | Loudon, NH | 10.6 mi SW | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 03837 or measure the distance to another ZIP code.
How to address mail to 03837
123 MAIN ST
GILMANTON IRON WORKS NH 03837
Put the city, the two-letter state code and the ZIP code on the last line. USPS also accepts GILMANTON IW as the city name for 03837. Adding the 4-digit ZIP+4 code (03837-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 03837?
- 03837 is a Gilmanton Iron Works, New Hampshire ZIP code. Gilmanton Iw is also accepted as the city name.
- What county is 03837 in?
- ZIP code 03837 is in Belknap County, New Hampshire.
- What time zone is ZIP code 03837 in?
- 03837 is in the Eastern Time zone (America/New_York).
- What area code is 03837?
- Phone numbers in ZIP code 03837 use area code 603.
- What is the population of ZIP code 03837?
- About 1,451 people live in ZIP code 03837, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 03837?
- The median household income in 03837 is $119,712 a year, higher than 78% of New Hampshire ZIP codes.
- What ZIP codes are near 03837?
- The nearest ZIP codes to 03837 are 03809 (Alton, 4.9 miles), 03237 (Gilmanton, 5.3 miles), 03225 (Center Barnstead, 5.3 miles) and 03810 (Alton Bay, 5.4 miles).