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/SULLIVAN

Sullivan ZIP code, New Hampshire

The ZIP code for Sullivan, NH is 03445, and its area code is 603.

USPS city name
1 ZIP code
Population
687
Area code
603

Sullivan in numbers

About 687 people live in Sullivan, in 266 households. The median household income is $106,667 a year, 8% above the New Hampshire median of $99,031 (US: $80,734). The median owner-occupied home is valued at $236,500 (41% below the New Hampshire median).

Population687Sullivan687
Households266Sullivan266
Median household income$106,667Sullivan$106,667New Hampshire$99,031US $80,734
Median home value$236,500Sullivan$236,500New Hampshire$402,500US $332,700

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

ZIP codes addressed as Sullivan

ZIP codes with the USPS city name Sullivan
ZIP City Type Population Median income Median home
03445 Sullivan , NH Standard 687 $106,667 $236,500

Map of Sullivan ZIP codes

03445

The ZIP codes of Sullivan, 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 Sullivan

The nearest larger towns are Keene (22,939 people, 6.6 mi), Marlborough (1,048 people, 8.0 mi) and West Swanzey (1,188 people, 12 mi).

Towns near Sullivan
TownPopulationDistance
Keene 22,939 6.6 mi
Bellows Falls, VT 2,891 14.6 mi
Peterborough 2,539 16.2 mi
Jaffrey 3,277 17.4 mi
Brattleboro, VT 7,657 20.6 mi
West Brattleboro, VT 2,749 22.6 mi
Henniker 2,993 22.8 mi
Springfield, VT 4,237 23.4 mi
Newport 4,758 23.9 mi
Winchendon, MA 4,331 25.1 mi
Claremont 13,078 26.0 mi
Orange, MA 3,737 29.0 mi
Athol, MA 8,801 29.5 mi
Baldwinville, MA 2,528 29.5 mi

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

Cite this page

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

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