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Zip Code 06423 — East Haddam, CT

06423 is a ZIP Code associated with East Haddam, CT, located within Lower Connecticut River Valley. The postal region supports an estimated population of 5,182 residents across Data Pending housing units, with a population density of 54.7 people per square mile.

WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (41.466540, -72.390540)

Data Metric	Local Statistic
Postal / Zip Code	06423
Primary City	East Haddam
State / Province	CT
County	Lower Connecticut River Valley
Total Population	5,182
Median Household Income	Data Pending
Total Housing Units	Data Pending
Population Density	54.7 people/sq mi
Timezone	America/New_York

How 06423 Compares

Metric	ZIP 06423	Lower Connecticut River Valley County	CT State Average
Population	5,182	175,346	3,624,508
Median Income	Data Pending	N/A	N/A
Population Density	54.7 /sq mi	--	--

Nearby ZIP Codes

ZIP Code	City	Distance	Population	Median Income
Zip 06439	Hadlyme	3.5 mi	65	N/A
Zip 06469	Moodus	4.2 mi	3,311	N/A
Zip 06438	Haddam	6.1 mi	2,887	N/A
Zip 06412	Chester	6.4 mi	3,825	N/A
Zip 06420	Salem	6.5 mi	4,368	N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →