Amite County Post Office

Find Amite County Mississippi 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.


Crosby Post Office 136 W Pine St Crosby MS 39633 601-639-4355


Gloster Post Office 200 East Main Street Gloster MS 39638 601-225-4392

Liberty Post Office 1010 Main Street Liberty MS 39645 601-657-8371

Smithdale Post Office 6005 Mississippi 570 Smithdale MS 39664 601-567-2621

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.