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/MILTON

Milton ZIP code, New Hampshire

The ZIP code for Milton, NH is 03851, and its area code is 603.

USPS city name
1 ZIP code
Population
356
Area code
603

Milton in numbers

About 356 people live in Milton, in 202 households. The median household income is $48,125 a year, 51% below the New Hampshire median of $99,031 (US: $80,734). The median owner-occupied home is valued at $240,400 (40% below the New Hampshire median), and median gross rent is $1,245 a month. The median age is 56.5; 16.6% of adults 25 and over hold a bachelor's degree or higher (40.6% across New Hampshire); the average commute takes 27 minutes.

Population356Milton356
Households202Milton202
Median age56.5Milton56.5New Hampshire43.3US 38.9
Median household income$48,125Milton$48,125New Hampshire$99,031US $80,734
Median home value$240,400Milton$240,400New Hampshire$402,500US $332,700
Median gross rent$1,245Milton$1,245New Hampshire$1,491US $1,413
Bachelor's degree or higher16.6%Milton16.6%New Hampshire40.6%US 35.7%
Mean commute27.1 minMilton27.1 minNew Hampshire26.7 minUS 26.4 min
Population density441 / sq miMilton441 / sq mi

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

ZIP codes addressed as Milton

ZIP codes with the USPS city name Milton
ZIP City Type Population Median income Median home
03851 Milton , NH Standard 4,333 $93,412 $314,300

Map of Milton ZIP codes

03851

The ZIP codes of Milton, 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 Milton

The nearest larger towns are Farmington (3,924 people, 4.0 mi), Rochester (33,144 people, 7.3 mi) and Sanbornville (1,317 people, 10 mi).

Towns near Milton
TownPopulationDistance
Farmington 3,924 4.0 mi
Rochester 33,144 7.3 mi
Somersworth 12,111 11.6 mi
Sanford, ME 22,247 11.9 mi
South Berwick, ME 3,381 15.4 mi
Dover 33,364 15.9 mi
Wolfeboro 2,531 17.2 mi
Durham 10,681 18.3 mi
South Eliot, ME 4,203 21.0 mi
Lake Arrowhead, ME 3,322 21.8 mi
Kennebunk, ME 6,221 22.5 mi
Newmarket 5,679 22.8 mi
York Harbor, ME 4,240 25.0 mi
Kittery, ME 5,110 25.1 mi

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

Cite this page

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

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