Greer County Post Office

Find Greer County Oklahoma 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.


Granite Post Office 402 Granite Avenue Granite OK 73547 580-535-2352


Mangum Post Office 101 South Pennsylvania Avenue Mangum OK 73554 580-782-2306

Willow Post Office 113 W Main St Willow OK 73673 580-287-3491

Post Offices by City

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.