Express mail in the United States

The United States Postal Service (USPS) provides Priority Mail Express for domestic U.S. delivery as well as international delivery.

The USPS formerly offered a second international express service separate from the EMS network, Global Express Guaranteed (GXG), which involved USPS offices acting as drop locations for international packages which would then be handled by the FedEx international delivery network.

In some countries, import rules for packages received by courier services have different tax brackets and duties than parcels received on the postal system, and thus while both were in operation EMS service (Priority Mail Express International), handled by international postal services outside the U.S., may have been preferred over Global Express Guaranteed, which USPS handed over to FedEx for international delivery via courier.

The term Priority Mail Express International is distinct from the domestic service called Priority Mail Express, which is a specific classification of mail for domestic accelerated postal delivery within the U.S.

In 2013, the USPS changed the name of the service from "Express Mail International" to "Priority Mail Express International".