ZIP Code 03851

03851 is one of New Hampshire's ZIP codes, delivering to addresses in Milton, Strafford County.

City: Milton
County: Strafford County
State: New Hampshire
Prefix: 038xx

Where this code sits

03851 is part of the 038xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Milton.

Milton New Hampshire ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 03851 delivers to without sharing its boundary.

603 Area code 603

ZIP codes nearest 03851

The ZIP codes whose reference points sit closest to 03851.
ZIP code	Distance	Delivers to
ZIP code 03835	3.6 mi	Farmington, NH
ZIP code 03887	5.1 mi	Union, NH
ZIP code 04027	5.5 mi	Lebanon, ME
ZIP code 03852	5.9 mi	Milton Mills, NH
ZIP code 03855	6.6 mi	New Durham, NH
ZIP code 03868	7.9 mi	Rochester, NH
ZIP code 03866	8.4 mi	Rochester, NH
ZIP code 03867	8.4 mi	Rochester, NH

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 03851, plotted from its record coordinates.

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

Scope ZIP code 03851. 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.