The Universal Postal Union (UPU) is a specialized agency of the United Nations that serves as the primary forum for cooperation between postal sector players worldwide, ensuring a truly universal network of postal services. Its membership largely comprises independent states across the globe.
Current UPU Membership Structure
As of the latest information, the UPU's membership encompasses a vast majority of the world's sovereign entities. Specifically, the members include:
- Vatican City: This independent sovereign state is a direct member of the UPU.
- Most United Nations Member States: The overwhelming majority of the 193 member states of the United Nations are also part of the UPU.
However, there are a few exceptions among the UN member states that have not joined the Universal Postal Union. These specific countries are:
| Country | Status (relative to UPU membership) |
|---|---|
| Andorra | UN Member, but not a UPU Member |
| Marshall Islands | UN Member, but not a UPU Member |
| Federated States of Micronesia | UN Member, but not a UPU Member |
| Palau | UN Member, but not a UPU Member |
Newest Member State
South Sudan holds the distinction of being the newest country to accede to the Universal Postal Union, having officially joined the organization on October 4, 2011.
Historical Context of UPU Membership
Prior to July 10, 1964, the process for states to become members of the Universal Postal Union involved formally ratifying the latest version of the Treaty of Bern. This foundational treaty established the UPU and laid down the initial principles for the international postal exchange.
