ZIP Code 03820

03820 is one of New Hampshire's ZIP codes, delivering to addresses in Dover, Strafford County.

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

Where this code sits

03820 is part of the 038xx range, the group of codes handled by one mail processing centre. Dover is served by 3 ZIP codes in total; the full list, with the county each falls in, is on the Dover page.

Dover New Hampshire ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 03820 delivers to without sharing its boundary.

603 Area code 603

ZIP codes nearest 03820

The ZIP codes whose reference points sit closest to 03820.
ZIP code	Distance	Delivers to
ZIP code 03821	0.9 mi	Dover, NH
ZIP code 03822	0.9 mi	Dover, NH
ZIP code 03823	3.0 mi	Madbury, NH
ZIP code 03869	3.8 mi	Rollinsford, NH
ZIP code 03878	4.4 mi	Somersworth, NH
ZIP code 03824	5.2 mi	Durham, NH
ZIP code 03908	5.8 mi	South Berwick, ME
ZIP code 03903	6.6 mi	Eliot, ME

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 03820, plotted from its record coordinates.

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

Scope ZIP code 03820. 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.