ZIP code 03237
Where is ZIP code 03237?
Gilmanton, New Hampshire
Belknap County · Standard ZIP code
ZIP code 03237 belongs to Gilmanton, New Hampshire in Belknap County. 03237 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 2,575 people live in the 03237 area, where the median household income is $111,359. The closest ZIP codes are 03220 (Belmont, 4.5 mi northwest), 03837 (Gilmanton Iron Works, 5.3 mi east) and 03252 (Lochmere, 7.2 mi northwest).
| ZIP code | 03237 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Gilmanton |
| State | New Hampshire (NH) |
| County | Belknap County |
| Time zone | Eastern Time · now |
| Area code | 603 |
| Coordinates | 43.4175, -71.4121 map |
| 3-digit prefix | 032 |
Population and income in 03237
| Population | 2,575 · lower than 52% of New Hampshire ZIP codes |
|---|---|
| People per square mile | 68 · lower than 61% of New Hampshire ZIP codes |
| Median age | 43.2 years · lower than 68% of New Hampshire ZIP codes |
| Men / women | 52% / 48% |
| Median household income | $111,359 · higher than 70% of New Hampshire ZIP codes |
| Income per person | $52,479 |
| Below the poverty line | 5.4% |
| Bachelor’s degree or higher | 36% of adults 25+ |
| Median home value | $345,400 · lower than 62% of New Hampshire ZIP codes |
| Housing units | 1,390 |
| Households | 1,097 (2.35 people on average) |
| Owners / renters | 99% / 1.1% |
| Land area | 37.96 sq mi (plus 1.04 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 03237. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 03237
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 03220 | Belmont, NH | 4.5 mi NW | Standard |
| 03837 | Gilmanton Iron Works, NH | 5.3 mi E | Standard |
| 03252 | Lochmere, NH | 7.2 mi NW | PO Box only |
| 03307 | Loudon, NH | 7.3 mi S | Standard |
| 03298 | Tilton, NH | 7.6 mi N | Unique |
| 03299 | Tilton, NH | 7.6 mi N | Unique |
| 03289 | Winnisquam, NH | 7.7 mi NW | PO Box only |
| 03224 | Canterbury, NH | 8.4 mi SW | Standard |
| 03218 | Barnstead, NH | 8.4 mi SE | Standard |
| 03276 | Tilton, NH | 8.8 mi W | Standard |
| 03249 | Gilford, NH | 9 mi N | Standard |
| 03810 | Alton Bay, NH | 9.4 mi NE | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 03237 or measure the distance to another ZIP code.
How to address mail to 03237
123 MAIN ST
GILMANTON NH 03237
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (03237-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 03237?
- 03237 is a Gilmanton, New Hampshire ZIP code.
- What county is 03237 in?
- ZIP code 03237 is in Belknap County, New Hampshire.
- What time zone is ZIP code 03237 in?
- 03237 is in the Eastern Time zone (America/New_York).
- What area code is 03237?
- Phone numbers in ZIP code 03237 use area code 603.
- What is the population of ZIP code 03237?
- About 2,575 people live in ZIP code 03237, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 03237?
- The median household income in 03237 is $111,359 a year, higher than 70% of New Hampshire ZIP codes.
- What ZIP codes are near 03237?
- The nearest ZIP codes to 03237 are 03220 (Belmont, 4.5 miles), 03837 (Gilmanton Iron Works, 5.3 miles), 03252 (Lochmere, 7.2 miles) and 03307 (Loudon, 7.3 miles).