Oswego County Post Office

Find Oswego 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.


Altmar Post Office 1964 Mexico Street Altmar NY 13302 315-298-4388


Bernhards Bay Post Office 694 Highway 49 Bernhards Bay NY 13028 315-675-3100

Central Square Post Office 555 South Main Street Central Square NY 13036 315-668-6711

Cleveland Post Office 100 Highway 49 Cleveland NY 13042 315-675-8364

Constantia Post Office 45 Redfield Street Constantia NY 13044 315-623-9049

Fulton Post Office 214 South 1st Street Fulton NY 13069 315-592-7158

Hannibal Post Office 1 Village Square Hannibal NY 13074 315-564-6327

Lacona Post Office 15 Park Avenue Lacona NY 13083 315-387-3813

Lycoming Post Office 1059 County Route 29 Oswego NY 13126 315-343-2765

Mallory Post Office 77 County Route 32 Mallory NY 13103 315-668-3043

Mexico Post Office 5640 Norman Avenue Mexico NY 13114 315-963-3611

Minetto Post Office 10 County Route 24 Minetto NY 13115 315-342-4590

New Haven Post Office 4250 Highway 104 Mexico NY 13114 315-963-3166

Orwell Post Office 2007 County Route 2 Orwell NY 13426 315-298-2871

Oswego Post Office 391 West 1st Street Oswego NY 13126 315-343-3881

Parish Post Office 2963 East Main Street Parish NY 13131 315-625-7511

Pennellville Post Office 374 County Route 54 Pennellville NY 13132 315-695-2397

Phoenix Post Office 99 Jefferson Street Phoenix NY 13135 315-695-3261

Pulaski Post Office 4909 Jefferson Street Pulaski NY 13142 315-298-2951

Redfield Post Office 7 School Road Redfield NY 13437 315-599-7371

Richland Post Office 1110 County Route 48 Richland NY 13144 315-298-4541

Sandy Creek Post Office 6067 South Main Street Sandy Creek NY 13145 315-387-3198

West Monroe Post Office 2301 New York 49 West Monroe NY 13167 315-668-2856

Williamstown Post Office 509 Highway 13 Williamstown NY 13493 315-964-2412

About Post Offices

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.