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/THORNTON

Thornton ZIP code, New Hampshire

The ZIP code for Thornton, NH is 03285, and its area code is 603.

USPS city name
1 ZIP code
Population
2,799
Area code
603

NANPA lists no telephone rate centre for Thornton itself, so these are the area codes of the nearest one, North Woodstock (5.3 miles). A town on an area-code boundary can differ from its neighbour.

Thornton in numbers

About 2,799 people live in Thornton, in 1,329 households. The median household income is $90,022 a year, 9% below the New Hampshire median of $99,031 (US: $80,734). The median owner-occupied home is valued at $351,900 (13% below the New Hampshire median).

Population2,799Thornton2,799
Households1,329Thornton1,329
Median household income$90,022Thornton$90,022New Hampshire$99,031US $80,734
Median home value$351,900Thornton$351,900New Hampshire$402,500US $332,700

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the ZIP code addressed as Thornton. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Thornton

ZIP codes with the USPS city name Thornton
ZIP City Type Population Median income Median home
03285 Thornton , NH Standard 2,799 $90,022 $351,900

Map of Thornton ZIP codes

03285

The ZIP codes of Thornton, 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 Thornton

The nearest larger towns are Plymouth (4,969 people, 15 mi), Conway (3,879 people, 26 mi) and Laconia (17,085 people, 27 mi).

Towns near Thornton
TownPopulationDistance
Plymouth 4,969 14.8 mi
Meredith 2,617 21.5 mi
Conway 3,879 25.8 mi
Laconia 17,085 26.8 mi
Littleton 4,114 27.3 mi

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

Cite this page

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

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