Charlestown New Hampshire ZIP Codes

Charlestown holds a single ZIP code.

Every ZIP code in Charlestown

The complete list of Charlestown, New Hampshire ZIP codes with the county each falls in.
ZIP code	County
03603	Sullivan 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Charlestown codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Charlestown. 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 Charlestown ZIP code begins 036. Those first three digits identify the sectional center facility that processes mail for this part of New Hampshire. Statewide that range covers 8 ZIP codes, so Charlestown accounts for 13% of it.

Every New Hampshire ZIP prefix and the region it covers →

Area codes covering Charlestown

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 Charlestown occupies.

603 Area code 603

Charlestown New Hampshire area codes in full →

Where Charlestown's ZIP codes sit

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

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

Cities near Charlestown

The closest places to Charlestown with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Walpole New Hampshire ZIP codes	11 mi	1 ZIP code
Claremont New Hampshire ZIP codes	11 mi	1 ZIP code
Newport New Hampshire ZIP codes	15 mi	1 ZIP code
Sunapee New Hampshire ZIP codes	20 mi	1 ZIP code
Keene New Hampshire ZIP codes	20 mi	2 ZIP codes
Newbury New Hampshire ZIP codes	22 mi	1 ZIP code
Grantham New Hampshire ZIP codes	24 mi	1 ZIP code
Antrim New Hampshire ZIP codes	27 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.