USPS Location
- Mt Vernon
726 Park Plz, Mt Vernon, IL 62864
618-242-0640
Burial Flags, Duck Stamps, General Delivery, Global Express Guaranteed, Greeting Card Services, Money Orders (Domestic), Money Orders (Inquiry), Money Orders (International), PO Box Online, Passport Acceptance, Passport Photo, Pickup Accountable Mail, Pickup Hold Mail, Priority Mail International