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
- State
- New Hampshire
- Country
- United States
- Coordinates
- 43.5519, -72.2704 — precision precise (locality)
View on OpenStreetMap - Population
- 1,917 (ZCTA, ACS 5-year)
- Median household income
- $104,700
- Median age
- 44.2
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
Nearby localities
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). Data generated on 2026-08-21. Methodology · Report an error on this page