Town of Groton, CT ZIP Codes
Town of Groton, Connecticut has 3 ZIP codes: 2 for street addresses ( and ) and 1 for PO boxes ().
Your street decides which one you use.
Which Town of Groton 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 Groton ZIP code map
Tap or point to an area to see its ZIP code.Full-size map
06349 has no area on the map: it is a PO box or single-organization ZIP code. Dashed line: Town of Groton town limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and county subdivision limits (2024).
All Town of Groton ZIP codes by type
| ZIP | Type and post office or station |
|---|---|
| 06340 | street delivery Borough |
| 06349 | PO boxes at the Groton Naval Base post office Groton Naval Base |
| 06355 | street delivery; mail may be addressed to Mystic Mystic |
Why your mail may say Town of Groton when you live outside it
Town of Groton ZIP codes also cover Conning Towers-Nautilus Park, Old Mystic and Groton, so a letter addressed to Town of Groton can go to a home outside the town limits.
A ZIP code does not set your city, school district or tax. Southeastern Connecticut Planning Region property records show which city you are in.
Town of Groton ZIP code questions
What is the main ZIP code for Town of Groton?
06340, the ZIP code of the main Borough post office at 202 Thames St.
Which Town of Groton ZIP codes are for PO boxes only?
06349. Mail to it goes to boxes at the post office, not to street addresses.
What county is Town of Groton in?
Southeastern Connecticut Planning Region.
ZIP codes for towns near Town of Groton
More towns near Town of Groton: Town of Manchester, Manchester, Town of Southampton, Warwick, Vernon, Cranston, Wallingford, East Hartford, Meriden.
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