ZIP code · Gilmanton · New Hampshire · United States
ZIP code 03237 — Gilmanton
ZIP code 03237 serves Gilmanton, New Hampshire.
- Postal code
- 03237Single source Value from one source, not cross-checked.
- City
- Gilmanton
- County
- Belknap FIPS 33001
- State
- New Hampshire
- Country
- United States
- Coordinates
- 43.4175, -71.4121 — precision precise (locality)
View on OpenStreetMap - Population
- 2,313 (ZCTA, ACS 5-year)
- Population density
- 61 / sq mi
- Land area
- 38 sq mi (98.3 km²) (ZCTA, ACS 5-year)
- Median household income
- $107,353
- Per-capita income
- $50,771
- Median age
- 43.5
- Households
- 1,004
- Housing units
- 1,340
- Median home value
- $317,600
- Congressional district
- NH-1 (119th Congress)
- USDA hardiness zone
- 5b (-15 to -10 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
- Area code
- 603 (from the nearest rate centre)Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 03237 with another ZIP · ZIPs within 25 miles · distance from 03237
Nearby localities
Map of ZIP code 03237
Climate — monthly normals
Warmest month Jul (avg high 82°F), coldest Jan (avg low 12°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 30 | 34 | 43 | 56 | 68 | 77 | 82 | 81 | 73 | 60 | 47 | 36 |
| Avg low °F | 12 | 13 | 21 | 33 | 45 | 55 | 60 | 59 | 52 | 40 | 30 | 20 |
| Precip in | 3.1 | 2.9 | 3.4 | 3.6 | 3.5 | 4.4 | 4.6 | 3.9 | 3.8 | 4.8 | 3.7 | 3.9 |
NOAA 1991–2020 climate normals from the nearest station: LAKEPORT 2 (9.4 mi) · NOAA NCEI
Places in ZIP 03237
- 1 hospitals & clinics
- 1 parks
- 1 gyms & sports centres
- 1 libraries
- 1 post offices
- 3 places of worship
- 1 gas stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page