ZIP Code 03781

03781 is one of New Hampshire's ZIP codes, delivering to addresses in Plainfield, Sullivan County.

City: Plainfield
County: Sullivan County
State: New Hampshire
Prefix: 037xx

Where this code sits

03781 is part of the 037xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Plainfield.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 03781 delivers to without sharing its boundary.

603 Area code 603

ZIP codes nearest 03781

The ZIP codes whose reference points sit closest to 03781.
ZIP code	Distance	Delivers to
ZIP code 03770	1.5 mi	Meriden, NH
ZIP code 03746	3.8 mi	Cornish Flat, NH
ZIP code 05052	5.1 mi	North Hartland, VT
ZIP code 03745	5.2 mi	Cornish, NH
ZIP code 03756	6.3 mi	Lebanon, NH
ZIP code 03784	6.5 mi	West Lebanon, NH
ZIP code 03766	6.6 mi	Lebanon, NH
ZIP code 05009	7.1 mi	White River Junction, VT

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 03781, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 03781. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.