Town of Greenwich, CT ZIP Codes
Town of Greenwich, Connecticut has 6 ZIP codes: 5 for street addresses (, , , and ) and 1 for PO boxes ().
Your street decides which one you use.
Which Town of Greenwich ZIP code is my address in?
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Town of Greenwich ZIP code map
Tap or point to an area to see its ZIP code.Full-size map
06836 has no area on the map: it is a PO box or single-organization ZIP code. Dashed line: Town of Greenwich town limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and county subdivision limits (2024).
All Town of Greenwich ZIP codes by type
| ZIP | Type and post office or station |
|---|---|
| 06807 | street delivery; mail may be addressed to Cos Cob Cos Cob |
| 06830 | street delivery Greenwich |
| 06831 | street delivery Greenwich |
| 06836 | PO boxes at the Downtown Greenwich post office Downtown Greenwich |
| 06870 | street delivery; mail may be addressed to Old Greenwich Old Greenwich |
| 06878 | street delivery; mail may be addressed to Riverside Old Greenwich |
Why your mail may say Town of Greenwich when you live outside it
Town of Greenwich ZIP codes also cover Greenwich, Riverside and Old Greenwich, so a letter addressed to Town of Greenwich can go to a home outside the town limits.
A ZIP code does not set your city, school district or tax. Western Connecticut Planning Region property records show which city you are in.
Town of Greenwich ZIP code questions
What is the main ZIP code for Town of Greenwich?
06830, the ZIP code of the main Greenwich post office at 29 Valley Dr.
Which Town of Greenwich ZIP codes are for PO boxes only?
06836. Mail to it goes to boxes at the post office, not to street addresses.
What county is Town of Greenwich in?
Western Connecticut Planning Region.
ZIP codes for towns near Town of Greenwich
More towns near Town of Greenwich: Greenburgh, Town of Eastchester, New Rochelle, Norwalk, Mount Vernon, Town of Ossining, Yonkers, Orangetown, North Hempstead.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections