Perhaps this helps? It's from http://www.un.org/Overview/unmember.html

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With the admission of Palau, there are now 185 Member States of the United Nations. The Member States and the dates on which they joined the Organization are listed below:

Member -- (Date of Admission)
Afghanistan -- (19 Nov. 1946)
Albania -- (14 Dec. 1955)
Algeria -- (8 Oct. 1962)
Andorra -- (28 July 1993)
Angola -- (1 Dec. 1976)
Antigua and Barbuda -- (11 Nov. 1981)
Argentina -- (24 Oct. 1945)
Armenia -- (2 Mar. 1992)
Australia -- (1 Nov. 1945)
Austria-- (14 Dec. 1955)
Azerbaijan -- (9 Mar. 1992)
Bahamas -- (18 Sep. 1973)
Bahrain -- (21 Sep. 1971)
Bangladesh -- (17 Sep. 1974)
Barbados -- (9 Dec. 1966)
Belarus -- (24 Oct. 1945)
--On 19 September 1991, Byelorussia informed the United Nations that it had changed its name to Belarus.

Belgium -- (27 Dec. 1945)
Belize -- (25 Sep. 1981)
Benin -- (20 Sep. 1960)
Bhutan -- (21 Sep. 1971)
Bolivia -- (14 Nov. 1945)
Bosnia and Herzegovina -- (22 May 1992)
Botswana -- (17 Oct. 1966)
Brazil -- (24 Oct. 1945)
Brunei Darussalam -- (21 Sep. 1984)
Bulgaria -- (14 Dec. 1955)
Burkina Faso -- (20 Sep. 1960)
Burundi -- (18 Sep. 1962)
Cambodia -- (14 Dec. 1955)
Cameroon -- (20 Sep. 1960)
Canada -- (9 Nov. 1945)
Cape Verde -- (16 Sep. 1975)
Central African Republic -- (20 Sep. 1960)
Chad -- (20 Sep. 1960)
Chile -- (24 Oct. 1945)
China -- (24 Oct. 1945)
Colombia -- (5 Nov. 1945)
Comoros -- (12 Nov. 1975)
Congo -- (20 Sep. 1960)
Costa Rica -- (2 Nov. 1945)
Côte d'Ivoire -- (20 Sep. 1960)
Croatia -- (22 May 1992)
Cuba -- (24 Oct. 1945)
Cyprus -- (20 Sep. 1960)
Czech Republic -- (19 Jan. 1993)
--Czechoslovakia was an original Member of the United Nations from 24 October 1945. In a letter dated 10 December 1992, its Permanent Representative informed the Secretary-General that the Czech and Slovak Federal Republic would cease to exist on 31 December 1992 and that the Czech Republic and the Slovak Republic, as successor States, would apply for membership in the United Nations. Following the receipt of its application, the Security Council, on 8 January, recommended to the General Assembly that the Czech Republic be admitted to United Nations membership. The Czech Republic was thus admitted on 19 January as a Member State.

Democratic People's Republic of Korea -- (17 Sep. 1991)
Democratic Republic of the Congo -- (20 Sep. 1960)
Denmark -- (24 Oct. 1945)
Djibouti -- (20 Sep. 1977)
Dominica -- (18 Dec. 1978)
Dominican Republic -- (24 Oct. 1945)
Ecuador -- (21 Dec. 1945)
Egypt -- (24 Oct. 1945)
--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.

El Salvador -- (24 Oct. 1945)
Equatorial Guinea -- (12 Nov. 1968)
Eritrea -- (28 May 1993)
Estonia -- (17 Sep. 1991)
Ethiopia -- (13 Nov. 1945)
Fiji -- (13 Oct. 1970)
Finland -- (14 Dec. 1955)
France -- (24 Oct. 1945)
Gabon -- (20 Sep. 1960)
Gambia -- (21 Sep. 1965)
Georgia -- (31 July 1992)
Germany -- (18 Sep. 1973)
-- 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 have united to form one sovereign State.

Ghana -- (8 Mar. 1957)
Greece -- (25 Oct. 1945)
Grenada -- (17 Sep. 1974)
Guatemala -- (21 Nov. 1945)
Guinea -- (12 Dec. 1958)
Guinea-Bissau -- (17 Sep. 1974)
Guyana -- (20 Sep. 1966)
Haiti -- (24 Oct. 1945)
Honduras -- (17 Dec. 1945)
Hungary -- (14 Dec. 1955)
Iceland -- (19 Nov. 1946)
India -- (30 Oct. 1945)
Indonesia -- (28 Sep. 1950)
--By letter of 20 January 1965, Indonesia announced its decision to withdraw from the United Nations "at this stage and under the present circumstances". By telegram of 19 September 1966, it announced its decision "to resume full cooperation with the United Nations and to resume participation in its activities". On 28 September 1966, the General Assembly took note of this decision and the President invited representatives of Indonesia to take seats in the Assembly.

Iran (Islamic Republic of)-- (24 Oct. 1945)
Iraq -- (21 Dec. 1945)
Ireland -- (14 Dec. 1955)
Israel -- (11 May 1949)
Italy -- (14 Dec. 1955)
Jamaica -- (18 Sep. 1962)
Japan -- (18 Dec. 1956)
Jordan -- (14 Dec. 1955)
Kazakhstan -- (2 Mar. 1992)
Kenya -- (16 Dec. 1963)
Kuwait -- (14 May 1963)
Kyrgyzstan -- (2 Mar. 1992)
Lao People's Democratic Republic -- (14 Dec. 1955)
Latvia -- (17 Sep. 1991)
Lebanon -- (24 Oct. 1945)
Lesotho -- (17 Oct. 1966)
Liberia -- (2 Nov. 1945)
Libyan Arab Jamahiriya -- (14 Dec. 1955)
Liechtenstein -- (18 Sep. 1990)
Lithuania -- (17 Sep. 1991)
Luxembourg -- (24 Oct. 1945)
Madagascar -- (20 Sep. 1960)
Malawi -- (1 Dec. 1964)
Malaysia -- (17 Sep. 1957)
--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.

Maldives -- (21 Sep. 1965)
Mali -- (28 Sep. 1960)
Malta -- (1 Dec. 1964)
Marshall Islands -- (17 Sep. 1991)
Mauritania -- (7 Oct. 1961)
Mauritius -- (24 Apr. 1968)
Mexico -- (7 Nov. 1945)
Micronesia (Federated States of)-- (17 Sep. 1991)
Monaco -- (28 May 1993)
Mongolia -- (27 Oct. 1961)
Morocco -- (12 Nov. 1956)
Mozambique -- (16 Sep. 1975)
Myanmar -- (19 Apr. 1948)
Namibia -- (23 Apr. 1990)
Nepal -- (14 Dec. 1955)
Netherlands -- (10 Dec. 1945)
New Zealand -- (24 Oct. 1945)
Nicaragua -- (24 Oct. 1945)
Niger -- (20 Sep. 1960)
Nigeria -- (7 Oct. 1960)
Norway -- (27 Nov. 1945)
Oman -- (7 Oct. 1971)
Pakistan -- (30 Sep. 1947)
Palau -- (15 Dec. 1994)
Panama -- (13 Nov. 1945)
Papua New Guinea -- (10 Oct. 1975)
Paraguay -- (24 Oct. 1945)
Peru -- (31 Oct. 1945)
Philippines -- (24 Oct. 1945)
Poland -- (24 Oct. 1945)
Portugal -- (14 Dec. 1955)
Qatar -- (21 Sep. 1971)
Republic of Korea -- (17 Sep. 1991)
Republic of Moldova -- (2 Mar. 1992)
Romania -- (14 Dec. 1955)
Russian Federation -- (24 Oct. 1945)
--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.

Rwanda -- (18 Sep. 1962)
Saint Kitts and Nevis -- (23 Sep. 1983)
Saint Lucia -- (18 Sep. 1979)
Saint Vincent and the Grenadines -- (16 Sep. 1980)
Samoa -- (15 Dec. 1976)
San Marino -- (2 Mar. 1992)
Sao Tome and Principe -- (16 Sep. 1975)
Saudi Arabia -- (24 Oct. 1945)
Senegal -- (28 Sep. 1960)
Seychelles -- (21 Sep. 1976)
Sierra Leone -- (27 Sep. 1961)
Singapore -- (21 Sep. 1965)
Slovakia -- (19 Jan. 1993)
--Czechoslovakia was an original Member of the United Nations from 24 October 1945. In a letter dated 10 December 1992, its Permanent Representative informed the Secretary-General that the Czech and Slovak Federal Republic would cease to exist on 31 December 1992 and that the Czech Republic and the Slovak Republic, as successor States, would apply for membership in the United Nations. Following the receipt of its application, the Security Council, on 8 January, recommended to the General Assembly that the Slovak Republic be admitted to United Nations membership. The Slovak Republic was thus admitted on 19 January as a Member State.

Slovenia -- (22 May 1992)
Solomon Islands -- (19 Sep. 1978)
Somalia -- (20 Sep. 1960)
South Africa -- (7 Nov. 1945)
Spain -- (14 Dec. 1955)
Sri Lanka -- (14 Dec. 1955)
Sudan -- (12 Nov. 1956)
Suriname -- (4 Dec. 1975)
Swaziland -- (24 Sep. 1968)
Sweden -- (19 Nov. 1946)
Syrian Arab Republic -- (24 Oct. 1945)
--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.

Tajikistan -- (2 Mar. 1992)
Thailand -- (16 Dec. 1946)
The former Yugoslav Republic of Macedonia -- (8 Apr. 1993)
--The General Assembly decided on 8 April 1993 to admit to United Nations membership 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.

Togo -- (20 Sep. 1960)
Trinidad and Tobago -- (18 Sep. 1962)
Tunisia -- (12 Nov. 1956)
Turkey -- (24 Oct. 1945)
Turkmenistan -- (2 Mar. 1992)
Uganda -- (25 Oct. 1962)
Ukraine -- (24 Oct. 1945)
United Arab Emirates -- (9 Dec. 1971)
United Kingdom of Great Britain and Northern Ireland -- (24 Oct. 1945)
United Republic of Tanzania -- (14 Dec. 1961)
--Tanganyika was a Member of the United Nations from 14 December 1961 and Zanzibar was a Member from 16 December 1963. Following the ratification on 26 April 1964 of Articles of Union between Tanganyika and Zanzibar, the United Republic of Tanganyika and Zanzibar continued as a single Member, changing its name to the United Republic of Tanzania on 1 November 1964.

United States of America -- (24 Oct. 1945)
Uruguay -- (18 Dec. 1945)
Uzbekistan -- (2 Mar. 1992)
Vanuatu -- (15 Sep. 1981)
Venezuela -- (15 Nov. 1945)
Viet Nam -- (20 Sep. 1977)
Yemen -- (30 Sep. 1947)
--Yemen was admitted to membership in the United Nations on 30 September 1947 and Democratic Yemen on 14 December 1967. On 22 May 1990, the two countries merged and have since been represented as one Member with the name "Yemen".

Yugoslavia -- (24 Oct. 1945)
Zambia -- (1 Dec. 1964)
Zimbabwe -- (25 Aug. 1980)



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Source: UN Press Release ORG/1190 (15 Dec. 1994)
Updated 13 August 1999