Dover, NH ZIP Codes
Dover, New Hampshire has 3 ZIP codes: for street addresses, for PO boxes and for a single organization.
Mail addressed to Dover covers nearby places too.
Where the 03820 ZIP code reaches
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03821 and 03822 have no area on the map: they are PO box or single-organization ZIP codes. Dashed line: Dover city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
Check an address in Dover
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Dover PO box and business ZIP codes
| ZIP | Type and post office or station |
|---|---|
| 03820 | street delivery Dover |
| 03821 | PO boxes at the Dover post office Dover |
| 03822 | one organization Dover |
Dover ZIP code questions
What is the main ZIP code for Dover?
03820, the ZIP code of the main Dover post office at 133 Washington St.
Which Dover ZIP codes are for PO boxes only?
03821. Mail to it goes to boxes at the post office, not to street addresses.
What county is Dover in?
Strafford County.
ZIP codes for towns near Dover
More towns near Dover: Concord, Lawrence, North Andover, Town of Andover, Gloucester, Dracut, Nashua, Tewksbury, Beverly.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections