Dover New Hampshire ZIP Codes

Dover holds 3 ZIP codes, all inside one county and one postal prefix.

Every ZIP code in Dover

The complete list of Dover, New Hampshire ZIP codes with the county each falls in.
ZIP code	County
03820	Strafford County
03821	Strafford County
03822	Strafford 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Dover codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Dover. 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 Dover ZIP code begins 038. Those first three digits identify the sectional center facility that processes mail for this part of New Hampshire. Statewide that range covers 77 ZIP codes, so Dover accounts for 4% of it.

Every New Hampshire ZIP prefix and the region it covers →

Area codes covering Dover

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 Dover occupies.

603 Area code 603

Dover New Hampshire area codes in full →

Where Dover's ZIP codes sit

Each point is one Dover ZIP code, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.

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

Cities near Dover

The closest places to Dover with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Madbury New Hampshire ZIP codes	3.0 mi	1 ZIP code
Somersworth New Hampshire ZIP codes	4.6 mi	1 ZIP code
Lee New Hampshire ZIP codes	7.4 mi	1 ZIP code
Newmarket New Hampshire ZIP codes	8.2 mi	1 ZIP code
Rochester New Hampshire ZIP codes	9.1 mi	4 ZIP codes
Portsmouth New Hampshire ZIP codes	10 mi	4 ZIP codes
Greenland New Hampshire ZIP codes	11 mi	1 ZIP code
Stratham New Hampshire ZIP codes	12 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.