Winchester New Hampshire ZIP Codes

Winchester holds a single ZIP code.

Every ZIP code in Winchester

The complete list of Winchester, New Hampshire ZIP codes with the county each falls in.
ZIP code	County
03470	Cheshire County

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Winchester codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Winchester. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.

How these codes cluster

Every Winchester ZIP code begins 034. Those first three digits identify the sectional center facility that processes mail for this part of New Hampshire. Statewide that range covers 28 ZIP codes, so Winchester accounts for 4% of it.

Every New Hampshire ZIP prefix and the region it covers →

Area codes covering Winchester

ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The code below serves the same ground Winchester occupies.

603 Area code 603

Winchester New Hampshire area codes in full →

Where Winchester's ZIP codes sit

Each point is one Winchester ZIP code, plotted from its record coordinates.

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

Cities near Winchester

The closest places to Winchester with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Swanzey New Hampshire ZIP codes	5.1 mi	1 ZIP code
Hinsdale New Hampshire ZIP codes	5.3 mi	1 ZIP code
Troy New Hampshire ZIP codes	11 mi	1 ZIP code
Keene New Hampshire ZIP codes	13 mi	2 ZIP codes
Rindge New Hampshire ZIP codes	19 mi	1 ZIP code
Dublin New Hampshire ZIP codes	19 mi	1 ZIP code
Walpole New Hampshire ZIP codes	21 mi	1 ZIP code
Antrim New Hampshire ZIP codes	29 mi	1 ZIP code

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