Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/NH/DOVER

Dover ZIP codes, New Hampshire

Dover, NH has 3 ZIP codes (03820, 03821 and 03822) and area code 603. The largest is 03820.

USPS city name
3 ZIP codes
Overlapping the city
1 more
Population
33,364
Area code
603

Mail addressed to Dover uses the ZIP codes above. 1 more ZIP code covers part of the city but is addressed as somewhere else; they are listed separately below.

Dover in numbers

About 33,364 people live in Dover, in 15,042 households, the 4th-largest of New Hampshire's 100 census places. The median household income is $94,829 a year, 4% below the New Hampshire median of $99,031 (US: $80,734). The median owner-occupied home is valued at $436,700 (8% above the New Hampshire median), and median gross rent is $1,607 a month. The median age is 36.9; 52.0% of adults 25 and over hold a bachelor's degree or higher (40.6% across New Hampshire); the average commute takes 23 minutes.

Population33,364Dover33,364
Households15,042Dover15,042
Median age36.9Dover36.9New Hampshire43.3US 38.9
Median household income$94,829Dover$94,829New Hampshire$99,031US $80,734
Median home value$436,700Dover$436,700New Hampshire$402,500US $332,700
Median gross rent$1,607Dover$1,607New Hampshire$1,491US $1,413
Bachelor's degree or higher52.0%Dover52.0%New Hampshire40.6%US 35.7%
Mean commute22.7 minDover22.7 minNew Hampshire26.7 minUS 26.4 min
Population density1,248 / sq miDover1,248 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Dover city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Dover

ZIP codes with the USPS city name Dover
ZIP City Type Population Median income Median home
03820 Dover , NH Standard 33,440 $94,897 $436,100
03821 Dover , NH No street area — — —
03822 Dover , NH No street area — — —

Other ZIP codes overlapping Dover

These ZIP codes cover part of Dover but are addressed as somewhere else.

ZIP codes overlapping Dover
ZIP City Type Population Median income Median home
03823 Madbury , NH Standard 2,203 $148,365 $476,900

Map of Dover ZIP codes

038200382103822

The ZIP codes of Dover, NH, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Dover

The nearest larger towns are Haverhill, MA (67,698 people, 30 mi), Manchester (115,643 people, 32 mi) and Methuen, MA (53,475 people, 34 mi).

Towns near Dover
TownPopulationDistance
Durham 10,681 3.7 mi
Somersworth 12,111 4.6 mi
South Berwick, ME 3,381 5.3 mi
South Eliot, ME 4,203 5.8 mi
Newmarket 5,679 8.2 mi
Rochester 33,144 9.1 mi
Kittery, ME 5,110 9.9 mi
Portsmouth 22,545 10.1 mi
York Harbor, ME 4,240 12.3 mi
Exeter 9,964 14.8 mi
Epping 2,796 15.1 mi
Hampton 10,101 17.0 mi
Farmington 3,924 17.5 mi
Sanford, ME 22,247 17.6 mi

More nearby: every ZIP code in Strafford County · New Hampshire ZIP codes

Cite this page

zipcodes.pro. “Dover, NH ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/nh/dover

Underlying data is public domain or openly licensed — sources, vintages and licences.