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ZIP Code 03803 – Portsmouth, NH

Portsmouth, New Hampshire · Rockingham County · Eastern time

ZIP code03803
CityPortsmouth
StateNew Hampshire
CountyRockingham County
Area code603
PopulationNot published (no Census ZIP area)
Time zoneEastern · local time
ZIP typePO box or unique ZIP (no Census area)
Center (lat, long)43.0718, -70.7626

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Nearby ZIP codes

03802 Portsmouth · 0 mi03804 Portsmouth · 0 mi03801 Portsmouth · 2.2 mi03854 New Castle · 2.4 mi03904 Kittery · 3 mi03870 Rye · 3.6 mi03840 Greenland · 4.7 mi03903 Eliot · 5.2 mi

About ZIP 03803

ZIP code 03803 is assigned to Portsmouth, New Hampshire. It lies in Rockingham County. It is a PO-box-only or single-address ZIP, so the Census Bureau does not publish an area for it; the location shown is approximate. The closest neighboring ZIP is 03802 (Portsmouth), about 0 miles away.

Every address in 03803 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources