List of members of the Universal Postal Union

The 192 members of the Universal Postal Union are listed below in alphabetical order, with the date of membership.

After this date, states become members by ratifying the Constitution of the Universal Postal Union, which incorporated the Treaty of Bern and added provisions to it.

Three states which were party to the Treaty of Bern in 1964, and hence members of the UPU, and which have signed but never ratified the Constitution are the Dominican Republic, Honduras, and Sudan.

[3] Also included as members are two "joint memberships" for dependent territories (one for the British overseas territories and one for the Caribbean constituent countries (Dutch: landen) of the Kingdom of the Netherlands (Aruba, Curaçao and Sint Maarten), originally as Netherlands Antilles).

",[4] the Constitution of the Universal Postal Union grandfathered them when membership was restricted to sovereign states.