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/NEW-LONDON

New London ZIP code, New Hampshire

The ZIP code for New London, NH is 03257, and its area code is 603.

USPS city name
1 ZIP code
Population
1,278
Area code
603

New London in numbers

About 1,278 people live in New London, in 217 households. The median owner-occupied home is valued at $481,000 (20% above the New Hampshire median), and median gross rent is $1,520 a month. The median age is 21.5; 50.3% of adults 25 and over hold a bachelor's degree or higher (40.6% across New Hampshire); the average commute takes 25 minutes.

Population1,278New London1,278
Households217New London217
Median age21.5New London21.5New Hampshire43.3US 38.9
Median home value$481,000New London$481,000New Hampshire$402,500US $332,700
Median gross rent$1,520New London$1,520New Hampshire$1,491US $1,413
Bachelor's degree or higher50.3%New London50.3%New Hampshire40.6%US 35.7%
Mean commute25.4 minNew London25.4 minNew Hampshire26.7 minUS 26.4 min
Population density1,150 / sq miNew London1,150 / sq mi

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

ZIP codes addressed as New London

ZIP codes with the USPS city name New London
ZIP City Type Population Median income Median home
03257 New London , NH Standard 4,484 $107,000 $559,000

Map of New London ZIP codes

03257

The ZIP codes of New London, 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 New London

The nearest larger towns are Newport (4,758 people, 10 mi), Franklin (8,799 people, 16 mi) and Claremont (13,078 people, 18 mi).

Towns near New London
TownPopulationDistance
Newport 4,758 10.2 mi
Franklin 8,799 16.1 mi
Claremont 13,078 17.6 mi
Henniker 2,993 18.2 mi
Tilton Northfield 3,101 19.8 mi
Lebanon 14,999 20.3 mi
White River Junction, VT 3,364 23.6 mi
Wilder, VT 3,087 24.7 mi
Concord 44,375 24.8 mi
Hanover 8,479 25.0 mi
Springfield, VT 4,237 26.2 mi
Plymouth 4,969 26.4 mi
Laconia 17,085 27.6 mi
Meredith 2,617 29.5 mi

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

Cite this page

zipcodes.pro. “New London, NH ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/nh/new-london

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