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/CT/EAST-HADDAM

East Haddam ZIP code, Connecticut

The ZIP code for East Haddam, CT is 06423, and its area codes are 860 and 959.

USPS city name
1 ZIP code
Population
5,182
Area codes
860, 959

NANPA lists no telephone rate centre for East Haddam itself, so these are the area codes of the nearest one, Moodus (4.6 miles). A town on an area-code boundary can differ from its neighbour.

East Haddam in numbers

About 5,182 people live in East Haddam, in 2,137 households. The median household income is $107,549 a year, 12% above the Connecticut median of $95,781 (US: $80,734). The median owner-occupied home is valued at $373,700 (about the same as the Connecticut median).

Population5,182East Haddam5,182
Households2,137East Haddam2,137
Median household income$107,549East Haddam$107,549Connecticut$95,781US $80,734
Median home value$373,700East Haddam$373,700Connecticut$366,900US $332,700

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

ZIP codes addressed as East Haddam

ZIP codes with the USPS city name East Haddam
ZIP City Type Population Median income Median home
06423 East Haddam , CT Standard 5,182 $107,549 $373,700

Map of East Haddam ZIP codes

06423

The ZIP codes of East Haddam, CT, 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 East Haddam

The nearest larger towns are Portland (5,944 people, 14 mi), Middletown (47,958 people, 15 mi) and Norwich (39,973 people, 17 mi).

Towns near East Haddam
TownPopulationDistance
Essex Village 2,705 6.9 mi
Colchester 4,692 8.9 mi
East Hampton 3,347 9.4 mi
Lake Pocotopaug 4,875 11.6 mi
Westbrook Center 2,501 12.4 mi
Oxoboxo River 2,782 13.7 mi
Niantic 3,123 13.9 mi
Clinton 3,465 14.4 mi
Portland 5,944 14.5 mi
Middletown 47,958 15.1 mi
Durham 3,347 15.2 mi
Waterford 3,304 15.6 mi
Norwich 39,973 16.9 mi
New London 27,625 17.5 mi

More nearby: every ZIP code in Middlesex County · Connecticut ZIP codes

Cite this page

zipcodes.pro. “East Haddam, CT ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ct/east-haddam

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