Member States

The Socialist Federal Republic of Yugoslavia was an original Member of the United Nations, the Charter having been signed on its behalf on 26 June 1945 and ratified 19 October 1945, until its dissolution following the establishment and subsequent admission as new Members of Bosnia and Herzegovina, the Republic of Croatia, the Republic of Slovenia, The former Yugoslav Republic of Macedonia, and the Federal Republic of Yugoslavia.
The Republic of Bosnia and Herzegovina was admitted as a Member of the United Nations by General Assembly resolution A/RES/46/237 of 22 May 1992.
The Republic of Croatia was admitted as a Member of the United Nations by General Assembly resolution A/RES/46/238 of 22 May 1992.
The Republic of Slovenia was admitted as a Member of the United Nations by General Assembly resolution A/RES/46/236 of 22 May 1992.
By resolution A/RES/47/225 of 8 April 1993, the General Assembly decided to admit as a Member of the United Nations the State being provisionally referred to for all purposes within the United Nations as "The former Yugoslav Republic of Macedonia" pending settlement of the difference that had arisen over its name.
The Federal Republic of Yugoslavia was admitted as a Member of the United Nations by General Assembly resolution A/RES/55/12 of 1 November 2000.
On 4 February 2003, following the adoption and promulgation of the Constitutional Charter of Serbia and Montenegro by the Assembly of the Federal Republic of Yugoslavia, the official name of " Federal Republic of Yugoslavia" was changed to Serbia and Montenegro.
In a letter dated 3 June 2006, the President of the Republic of Serbia informed the Secretary-General that the membership of Serbia and Montenegro was being continued by the Republic of Serbia, following Montenegro's declaration of independence.
Montenegro held a 21 May 2006 referendum and declared itself independent from Serbia on 3 June.
On 28 June 2006 it was accepted as a United Nations Member State by General Assembly resolution A/RES/60/264.

Zaire joined the United Nations on 20 September 1960. 
On 17 May 1997, its name was changed to the Democratic Republic of the Congo. 

Egypt and Syria were original Members of the United Nations from 24 October 1945.
Following a plebiscite on 21 February 1958, the United Arab Republic was established by a union of Egypt and Syria and continued as a single Member.
On 13 October 1961, Syria, having resumed its status as an independent State, resumed its separate membership in the United Nations.
On 2 September 1971, the United Arab Republic changed its name to the Arab Republic of Egypt.

The Federal Republic of Germany and the German Democratic Republic were admitted to membership in the United Nations on 18 September 1973. 
Through the accession of the German Democratic Republic to the Federal Republic of Germany, effective from 3 October 1990, the two German States united to form one sovereign State.

Following the adoption by the General Assembly of resolution 66/1, the Permanent Mission of Libya to the United Nations formally notified the United Nations of a Declaration by the National Transitional Council of 3 August changing the official name of the Libyan Arab Jamahiriya to "Libya" and changing Libya's national flag.

On 22 December 2017, the Permanent Mission of Libya to the United Nations formally notified the United Nations that the government is changing the official name of Libya to “State of Libya.”  

The Socialist Federal Republic of Yugoslavia was an original Member of the United Nations, the Charter having been signed on its behalf on 26 June 1945 and ratified 19 October 1945, until its dissolution following the establishment and subsequent admission as new Members of Bosnia and Herzegovina, the Republic of Croatia, the Republic of Slovenia, The former Yugoslav Republic of Macedonia, and the Federal Republic of Yugoslavia.
The Republic of Bosnia and Herzegovina was admitted as a Member of the United Nations by General Assembly resolution A/RES/46/237 of 22 May 1992.
The Republic of Croatia was admitted as a Member of the United Nations by General Assembly resolution A/RES/46/238 of 22 May 1992.
The Republic of Slovenia was admitted as a Member of the United Nations by General Assembly resolution A/RES/46/236 of 22 May 1992.
By resolution A/RES/47/225 of 8 April 1993, the General Assembly decided to admit as a Member of the United Nations the State being provisionally referred to for all purposes within the United Nations as "The former Yugoslav Republic of Macedonia" pending settlement of the difference that had arisen over its name.
The Federal Republic of Yugoslavia was admitted as a Member of the United Nations by General Assembly resolution A/RES/55/12 of 1 November 2000.
On 4 February 2003, following the adoption and promulgation of the Constitutional Charter of Serbia and Montenegro by the Assembly of the Federal Republic of Yugoslavia, the official name of " Federal Republic of Yugoslavia" was changed to Serbia and Montenegro.
In a letter dated 3 June 2006, the President of the Republic of Serbia informed the Secretary-General that the membership of Serbia and Montenegro was being continued by the Republic of Serbia, following Montenegro's declaration of independence.
Montenegro held a 21 May 2006 referendum and declared itself independent from Serbia on 3 June.
On 28 June 2006 it was accepted as a United Nations Member State by General Assembly resolution A/RES/60/264.

The Union of Soviet Socialist Republics was an original Member of the United Nations from 24 October 1945.
In a letter dated 24 December 1991, Boris Yeltsin, the President of the Russian Federation, informed the Secretary-General that the membership of the Soviet Union in the Security Council and all other United Nations organs was being continued by the Russian Federation with the support of the 11 member countries of the Commonwealth of Independent States.

The Federation of Malaya joined the United Nations on 17 September 1957.
On 16 September 1963, its name was changed to Malaysia, following the admission to the new federation of Singapore, Sabah (North Borneo) and Sarawak.
Singapore became an independent State on 9 August 1965 and a Member of the United Nations on 21 September 1965.

The Socialist Federal Republic of Yugoslavia was an original Member of the United Nations, the Charter having been signed on its behalf on 26 June 1945 and ratified 19 October 1945, until its dissolution following the establishment and subsequent admission as new Members of Bosnia and Herzegovina, the Republic of Croatia, the Republic of Slovenia, The former Yugoslav Republic of Macedonia, and the Federal Republic of Yugoslavia.
The Republic of Bosnia and Herzegovina was admitted as a Member of the United Nations by General Assembly resolution A/RES/46/237 of 22 May 1992. The Republic of Croatia was admitted as a Member of the United Nations by General Assembly resolution A/RES/46/238 of 22 May 1992. The Republic of Slovenia was admitted as a Member of the United Nations by General Assembly resolution A/RES/46/236 of 22 May 1992. By resolution A/RES/47/225 of 8 April 1993, the General Assembly decided to admit as a Member of the United Nations the State being provisionally referred to for all purposes within the United Nations as "The former Yugoslav Republic of Macedonia" pending settlement of the difference that had arisen over its name. The Federal Republic of Yugoslavia was admitted as a Member of the United Nations by General Assembly resolution A/RES/55/12 of 1 November 2000.
On 4 February 2003, following the adoption and promulgation of the Constitutional Charter of Serbia and Montenegro by the Assembly of the Federal Republic of Yugoslavia, the official name of " Federal Republic of Yugoslavia" was changed to Serbia and Montenegro.
In a letter dated 3 June 2006, the President of the Republic of Serbia informed the Secretary-General that the membership of Serbia and Montenegro was being continued by the Republic of Serbia, following Montenegro's declaration of independence.
Montenegro held a 21 May 2006 referendum and declared itself independent from Serbia on 3 June.
On 28 June 2006 it was accepted as a United Nations Member State by General Assembly resolution A/RES/60/264.

The 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 ‎was admitted as a new Member State ‎by the United Nations General Assembly on 14 ‎July 2011.