06378 Post Office

Find 06378 post offices and USPS mailing boxes. Post offices provide information on bulk mail services, domestic mail delivery, international shipping, change of address, mail forwarding, PO boxes, and passport services.


Old Mystic Post Office 47 Main Street Stonington CT 06378 860-536-0510


Stonington Post Office 20 Broad Street Stonington CT 06378 860-535-0454

Pawcatuck Post Office 66 South Broad Street Stonington CT 06379 3.1 miles from 06378 860-599-6980

Mystic Post Office 23 East Main Street Stonington CT 06355 3.6 miles from 06378 860-536-8143

High St Station Post Office 5 High Street Westerly RI 02891 4.1 miles from 06378 401-596-9537

West Mystic Post Office 55 West Mystic Avenue Groton CT 06355 4.4 miles from 06378 860-536-0530

North Stonington Post Office 391 Norwich-Westerly Road North Stonington CT 06359 4.5 miles from 06378 860-535-2871

Westerly Post Office 110 Tom Harvey Road Westerly RI 02891 5.5 miles from 06378 401-596-1181

Noank Post Office 19 Pearl Street Groton CT 06340 5.8 miles from 06378 860-536-1433

Ashaway Post Office 129 Main Street Hopkinton RI 02804 6.5 miles from 06378 401-377-8092

Ledyard Post Office 764 Colonel Ledyard Highway Ledyard CT 06339 7.1 miles from 06378 860-464-3147

Groton Long Point Post Office 44 Beach Road Groton CT 06340 7.2 miles from 06378 860-536-1404

Groton Post Office 100 Plaza Court Groton CT 06340 7.7 miles from 06378 860-445-8154

Fishers Island Post Office 1 Oriental Ave Fishers Island NY 06390 8.2 miles from 06378 631-788-7835

Bradford Post Office 416 Bradford Road Westerly RI 02808 8.4 miles from 06378 401-377-8976

Hopkinton Post Office 482 Main Street Hopkinton RI 02804 8.6 miles from 06378 401-377-8084

Groton Naval Base Post Office 1 Naval Submarine Base Groton CT 06349 9.1 miles from 06378 860-445-7744

Borough Post Office 202 Thames Street Groton CT 06340 9.3 miles from 06378 860-445-0180

Gales Ferry Post Office 12 Military Highway Ledyard CT 06335 9.6 miles from 06378 860-464-7681

New London Post Office 27 Masonic Street New London CT 06320 9.9 miles from 06378 860-443-4393

What Change of Address options are available?

Customers can request a temporary or permanent Change of Address either online or in person at the Post Office using PS Form 3575. The online application for Change of Address has a $1.00 identity validation fee.

Is it possible to insure mail and items sent via the USPS?

Yes. Standard mail can be insured for up to $5,000 for an additional fee. Registered mail items can be insured for up to $50,000.

What is the USPS Office of Inspector General?

The Office of Inspector General (OIG) is a division within the USPS responsible for ensuring the integrity and accountability of the postal service. It conducts investigations to safeguard the postal system and performs audits and reviews.