St. Lawrence County Post Office

Find St. Lawrence County New York 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.


Brasher Falls Post Office 905 Highway 11C Winthrop NY 13697 315-389-5090


Brier Hill Post Office 39 County Road 2 Brier Hill NY 13614 315-375-6767

Canton Post Office 100 Main Street Canton NY 13617 315-386-4502

Chase Mills Post Office 5275 County Road 14 Chase Mills NY 13621 315-322-5573

Chippewa Bay Post Office 1176 County Road 6 Hammond NY 13646 315-324-5550

Colton Post Office 4841 Highway 56 Colton NY 13625 315-262-2559

Cranberry Lake Post Office 7171 Highway 3 Cranberry Lake NY 12927 315-848-3574

De Kalb Junction Post Office 4329 Route 11 De Kalb Junction NY 13630 315-347-3397

De Peyster Post Office 4386 County Road 10 De Peyster NY 13633 315-344-6519

Edwards Post Office 196 Main Street Edwards NY 13635 315-562-3200

Fine Post Office 8 Spring Fine NY 13639 315-848-3442

Gouverneur Post Office 35 Grove Street Gouverneur NY 13642 315-287-0520

Hailesboro Post Office 97 Main Street Hailesboro NY 13645 315-287-0099

Hammond Post Office 50 South Main Street Hammond NY 13646 315-324-5841

Hannawa Falls Post Office 5890 Highway 56 Potsdam NY 13676 315-265-8842

Helena Post Office 1 Deer River Road Helena NY 13649 315-769-9426

Hermon Post Office 88 Main Street Hermon NY 13652 315-347-3262

Heuvelton Post Office 107B State St Heuvelton NY 13654 315-344-8801

Hogansburg Post Office 11 Saint Regis Street Brasher Falls NY 13613 518-358-2277

Keene Post Office 73 New York State Bicycle Route 11 Gouverneur NY 13642 518-576-9966

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.