Enlargement of the United Nations

As of , there are member states of the United Nations (UN), each of which is a member of the United Nations General Assembly.
The following is a list of United Nations member states arranged in chronological order according to their dates of admission (with the United Nations Security Council resolutions that recommended their admission and the United Nations General Assembly resolutions that admitted them, signified with SCR and GAR, respectively), including former members. Members denoted with "→" changed their names, had their memberships in the UN continued by a successor state, merged with other members, or were dissolved.
Timeline of Enlargement of the United Nations.
1940s.
1945 (original members).
The UN officially came into existence on 24 October 1945, after ratification of the United Nations Charter by the five permanent members of the United Nations Security Council (China, France, the Soviet Union, the United Kingdom, and the United States) and a majority of the other signatories. A total of 51 original members (or founding members) joined that year; 50 of them signed the Charter at the United Nations Conference on International Organization in San Francisco on 26 June 1945, while Poland, which was not represented at the conference, signed it on 15 October 1945.
24 October 1945
25 October 1945
30 October 1945
31 October 1945
1 November 1945
2 November 1945
5 November 1945
7 November 1945
9 November 1945
13 November 1945
14 November 1945
15 November 1945
21 November 1945
27 November 1945
10 December 1945
17 December 1945
18 December 1945
21 December 1945
27 December 1945
1946.
19 November 1946 (all by SCR 8 and GAR 34)
16 December 1946
1947.
30 September 1947 (all by SCR 29 and GAR 108)
1948.
19 April 1948
1949.
11 May 1949
1950s.
1950.
28 September 1950
1955.
14 December 1955
1956.
12 November 1956
18 December 1956
1957.
8 March 1957
17 September 1957
1958.
22 February 1958
12 December 1958
1960s.
1960.
20 September 1960
28 September 1960
7 October 1960
1961.
27 September 1961
27 October 1961
14 December 1961
1962.
18 September 1962
8 October 1962
25 October 1962
1963.
14 May 1963
16 December 1963
1964.
1 December 1964
1965.
20 January 1965
21 September 1965
1966.
20 September 1966
28 September 1966
17 October 1966
9 December 1966
1967.
14 December 1967
1968.
24 April 1968
24 September 1968
12 November 1968
1970s.
1970.
13 October 1970
1971.
21 September 1971
7 October 1971
25 October 1971
9 December 1971
1973.
18 September 1973
1974.
17 September 1974
1975.
16 September 1975
10 October 1975
12 November 1975
4 December 1975
1976.
21 September 1976
1 December 1976
15 December 1976
1977.
20 September 1977
1978.
19 September 1978
18 December 1978
1979.
18 September 1979
1980s.
1980.
25 August 1980
16 September 1980
1981.
15 September 1981
25 September 1981
11 November 1981
1983.
23 September 1983
1984.
21 September 1984
1990s.
1990.
23 April 1990
18 September 1990
1991.
24 August 1991
17 September 1991
1992.
2 March 1992
22 May 1992
31 July 1992
1993.
19 January 1993
8 April 1993
28 May 1993
28 July 1993
1994.
15 December 1994
1999.
14 September 1999
2000s.
2000.
5 September 2000
1 November 2000
2002.
10 September 2002
27 September 2002
2006.
28 June 2006
2010s.
2011.
14 July 2011
Summary.
Below is a summary of the growth in UN membership.