Home > NH > Sullivan County > Plainfield > Zip 03781

Zip Code 03781 — Plainfield, NH

03781 is a ZIP Code associated with Plainfield, NH, located within Sullivan. The postal region supports an estimated population of 1,918 residents across Data Pending housing units, with a population density of 15.5 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (43.552600, -72.283990)

Data MetricLocal Statistic
Postal / Zip Code03781
Primary CityPlainfield
State / ProvinceNH
CountySullivan
Total Population1,918
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density15.5 people/sq mi
TimezoneAmerica/New_York

How 03781 Compares

MetricZIP 03781Sullivan CountyNH State Average
Population1,91842,8021,394,951
Median IncomeData PendingN/AN/A
Population Density15.5 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 03770Meriden1.6 mi604N/A
Zip 03745Cornish5.7 mi1,816N/A
Zip 03784West Lebanon5.9 mi3,804N/A
Zip 03766Lebanon6.1 mi11,195N/A
Zip 03753Grantham7.3 mi3,509N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →