The United Nations is officially established on October 24, 1945 as its Charter comes into force, when the Charter was ratified by a majority of signatories, 51 countries, including the five permanent members of the Security Council (China, France, the Soviet Union, the United Kingdom, and the United States).
Today, there are 193 member states in the United Nations. These member states are all sovereign states and have equal representation in the UN General Assembly. The United Nations also has two observer states: the Holy See and Palestine. More