Only sovereign nations are allowed to become members of the UN. Palestine is a "non-member entity" and has applied for membership. The country has to be approved by the five permanent member countries: China, France, Russia, the United Kingdom, and the United States). The five most highly-population countries are:The constant flux of politics and globalization are continually redefining countries, so agreeing on a final count can be difficult. However, in a few cases, states were suspended or expelled from participating in UN activities by means other than Articles 5 or 6:A Member of the United Nations which has persistently violated the Principles contained in the present Charter may be expelled from the Organization by the General Assembly upon the recommendation of the Security Council. According to the United Nations Department for General Assembly and Conference Management, 54 countries belong to the African Group and are Members of the United Nations. Based in Barcelona, Spain, Catalonia is the country's financial center. On 3 January 2018, the Permanent Mission of Guyana to the United Nations formally notified the United Nations that in accordance with the Constitution of Guyana the official name of the Republic of Guyana is âCo-operative Republic of Guyana.âThe Republic of South Sudan formally seceded from Sudan on 9 July 2011 as a result of an internationally monitored referendum held in January 2011, and âwas admitted as a new Member State âby the United Nations General Assembly on 14 âJuly 2011.Further to the communication dated 14 February 2019 from the Permanent Mission addressed to the Protocol and Liaison Service, the country name was changed to the Republic of North Macedonia (short form: North Macedonia) from the former name of The former Yugoslav Republic of Macedonia. Czechoslovakia was an original member of the United Nations from Oct. 24, 1945. New members are admitted to the UN on the recommendation of the Security Council and by a two-thirds vote of the General Assembly. 3. Membership of the United Nations Security Council is held by the five permanent members … Taiwan is no longer a member because its seat was given to Communist China, which say Taiwan is, in any case, really a part of it. This is because Libya has often been in turmoil, because of extremists there fighting for control and different governments trying to take over since Gaddafi was overthrown. In addition to the reasons already described, here are some additional facts.Some researchers believe that there could be even more countries in the future. See the link below for a list. As of 2006, there exist 192 United Nations member states, including virtually all internationally recognized independent states. Not included in this total count of 195 countries are: Taiwan - the United Nations considers it represented by the People's Republic of China Only five countries were able to join while they were still under the control of other nations.