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ZIP Code Database - Facts & Stats

Data Last Updated: March 1, 2023

ZIP Codes for City of Darien, CT

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Area Code(s):203, 475
Timezone(s):Eastern (GMT -05:00)
City Population:20,732 (More Details)
CBSA:Bridgeport-Stamford-Norwalk, CT
Congressional District(s):04
Land Area:625 square miles (county)
Water Area:212 square miles (county)

1 ZIP Code

Darien, CT ZIP Code Boundaries

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Darien, CT Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases
06820Standard20,732100.00%NOROTON, NOROTON HEIGHTS, TOKENEKE

Darien, CT Demographic Information *

Total population**20,732
Male population10,220
Female population10,512
Median age (years)39.1
White Population19,508
Black Population104
Indian Population20
Asian Population744
Hawaiian Population5
Hispanic Population743
Median age (Male)37.7
Median age (Female)40.1
Total households6,698
Family households (families)5,503
Average household size3.09
Average family size3.48
Total housing units7,074
* Demographic data is based on 2010 Census for the City of DARIEN.
** City and ZIP Code Population will not be equal due to differences in their geographies.


  1. U.S. Postal Service [Last Updated: 2/1/2023],
  2. Internal Data Creation [Last Updated: 2/1/2023],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],