Old Greenwich ZIP Codes

List of Zip Codes of Old Greenwich

The following table lists ZIP Codes associated with Old Greenwich, Connecticut, based on ZIP Code Tabulation Area (ZCTA) data from the U.S. Census Bureau.

About Old Greenwich Connecticut Zip Codes

The city of Old Greenwich in Connecticut (CT) is served by approximately 1 ZIP Codes. These codes cover residential neighborhoods, business districts, and surrounding localities that use the city name in their mailing address.

Based on ZIP-level population estimates, the combined population covered by these ZIP Codes is around 7,903 people. Population density can vary significantly from one ZIP Code to another, reflecting the mix of dense urban blocks, commercial corridors, and lower-density residential areas.

The ZIP Codes associated with Old Greenwich fall within county jurisdictions such as Western Connecticut. Each county manages local services, land use, and administration for the areas corresponding to its ZIP Codes.

Most ZIP codes for Old Greenwich, Connecticut follow the America/New_York time zone.