ZIP code · Plainfield · New Hampshire · United States
ZIP code 03781 — Plainfield
ZIP code 03781 serves Plainfield, New Hampshire.
- Postal code
- 03781Single source Value from one source, not cross-checked.
- City
- Plainfield
- County
- Sullivan FIPS 33019
- State
- New Hampshire
- Country
- United States
- Coordinates
- 43.5519, -72.2704 — precision precise (locality)
View on OpenStreetMap - Population
- 1,917 (ZCTA, ACS 5-year)
- Population density
- 40 / sq mi
- Land area
- 47.8 sq mi (123.9 km²) (ZCTA, ACS 5-year)
- Median household income
- $104,700
- Per-capita income
- $56,857
- Median age
- 44.2
- Households
- 700
- Housing units
- 840
- Median home value
- $389,800
- Median gross rent
- $1,712 / month
- Congressional district
- NH-2 (119th Congress)
- USDA hardiness zone
- 5a (-20 to -15 °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
- 603Telephone 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 03781 with another ZIP · ZIPs within 25 miles · distance from 03781
Nearby localities
Map of ZIP code 03781
Climate — monthly normals
Warmest month Jul (avg high 83°F), coldest Jan (avg low 9°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 30 | 34 | 43 | 57 | 70 | 78 | 83 | 81 | 73 | 60 | 47 | 36 |
| Avg low °F | 9 | 11 | 21 | 32 | 44 | 52 | 58 | 56 | 49 | 37 | 28 | 18 |
| Precip in | 2.3 | 2.1 | 2.7 | 3.0 | 3.3 | 3.8 | 4.0 | 3.6 | 3.4 | 4.0 | 3.0 | 2.8 |
NOAA 1991–2020 climate normals from the nearest station: LEBANON MUNI AP (5.4 mi) · NOAA NCEI
Places in ZIP 03781
- 1 schools
- 2 parks
- 1 playgrounds
- 2 libraries
- 3 places of worship
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