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

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zipcodes.pro — CITY/NH/ALTON

Alton ZIP code, New Hampshire

The ZIP code for Alton, NH is 03809, and its area code is 603.

USPS city name
1 ZIP code
Overlapping the city
1 more
Population
281
Area code
603

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

Alton in numbers

About 281 people live in Alton, in 117 households. The median owner-occupied home is valued at $363,300 (10% below the New Hampshire median). The median age is 58.4; 16.5% of adults 25 and over hold a bachelor's degree or higher (40.6% across New Hampshire).

Population281Alton281
Households117Alton117
Median age58.4Alton58.4New Hampshire43.3US 38.9
Median home value$363,300Alton$363,300New Hampshire$402,500US $332,700
Bachelor's degree or higher16.5%Alton16.5%New Hampshire40.6%US 35.7%
Population density600 / sq miAlton600 / sq mi

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

ZIP codes addressed as Alton

ZIP codes with the USPS city name Alton
ZIP City Type Population Median income Median home
03809 Alton , NH Standard 3,680 $106,397 $387,500

Other ZIP codes overlapping Alton

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

ZIP codes overlapping Alton
ZIP City Type Population Median income Median home
03810 Alton Bay , NH Standard 2,314 $148,261 $569,200

Map of Alton ZIP codes

03809

The ZIP codes of Alton, 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 Alton

The nearest larger towns are Farmington (3,924 people, 8.5 mi), Wolfeboro (2,531 people, 9.5 mi) and Sanbornville (1,317 people, 12 mi).

Towns near Alton
TownPopulationDistance
Farmington 3,924 8.5 mi
Wolfeboro 2,531 9.5 mi
Laconia 17,085 15.4 mi
Rochester 33,144 16.5 mi
Tilton Northfield 3,101 18.6 mi
Meredith 2,617 19.3 mi
Somersworth 12,111 21.9 mi
Franklin 8,799 22.4 mi
Concord 44,375 23.0 mi
Sanford, ME 22,247 23.4 mi
Suncook 5,432 25.0 mi
Dover 33,364 25.3 mi
Durham 10,681 26.3 mi
South Berwick, ME 3,381 26.4 mi

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

Cite this page

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

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