1945 Original 51 Members

Argentina, Australia, Belgium, Bolivia[+], Brazil, Byelorussian Soviet Socialist Republic[+], Canada, Chile, China, Colombia, Costa Rica, Cuba, Czechoslovakia[+], Denmark, Dominican Republic, Ecuador, Egypt[+], El Salvador, Ethiopia, France, Greece, Guatemala, Haiti, Honduras, India, Iran[+], Iraq, Lebanon, Liberia, Luxembourg, Mexico, Netherlands, New Zealand, Nicaragua, Norway, Panama, Paraguay, Peru, Philippine Republic[+] , Poland, Saudi Arabia, Syria[+], Turkey, Ukrainian Soviet Socialist Republic[+], Union of South Africa[+], Union of Soviet Socialist Republics[+], United Kingdom, United States, Uruguay, Venezuela, Yugoslavia[+]

1946 55 Members

Afghanistan, Iceland, Siam[+], Sweden

1947 57 Members

Pakistan, Yemen[+]

1948 58 Members

Burma[+]

1949 59 Members

Israel

1950 60 Members

Indonesia[+]

1955 76 Members

Albania, Austria, Bulgaria, Cambodia, Ceylon[+], Finland, Hungary, Ireland, Italy, Jordan, Laos[+], Libya[+], Nepal, Portugal, Romania, Spain

1956 80 Members

Japan, Morocco, Sudan, Tunisia

1957 82 Members

Ghana, Federation of Malaya [+]

1958 82 Members

Guinea

1960 99 Members

Cameroun, Central African Republic, Chad, Congo (Brazzaville)[+], Congo (Leopoldville)[+], Cyprus, Dahomey[+], Gabon, Ivory Coast[+], Malagasy Republic[+], Mali, Niger, Nigeria, Senegal, Somalia, Togo, Upper Volta[+]

1961 104 Members

Mauritania, Mongolia, Sierra Leone, Tanganyika[+]

1962 110 Members

Algeria, Burundi, Jamaica, Rwanda, Trinidad and Tobago, Uganda

1963 113 Members

Kenya, Kuwait, Zanzibar[+]

1964 115 Members

Malawi, Malta, Zambia

1965 117 Members

The Gambia, Maldive Islands, Singapore[+]

1966 122 Members

Barbados, Botswana, Guyana, Lesotho

1967 123 Members

Yemen[+]

1968 126 Members

Equatorial Guinea, Mauritius, Swaziland

1970 127 Members

Fiji

1971 132 Members

Bahrain, Bhutan, Oman, Qatar, United Arab Emirates

1973 135 Members

Bahamas, Federal Republic of Germany[+], German Democratic Republic[+]

1974 138 Members

Bangladesh, Grenada, Guinea-Bissau

1975 144 Members

Cape Verde, Comoros, Mozambique, Papua New Guinea, Sao Tome and Principe, Suriname

1976 147 Members

Angola, Samoa, Seychelles

1977 149 Members

Djibouti, Viet Nam

1978 151 Members

Dominica, Solomon Islands

1979 152 Members

Saint Lucia

1980 154 Members

Saint Vincent and the Grenadines, Zimbabwe

1981 157 Members

Antigua and Barbuda, Belize, Vanuatu

1983 158 Members

Saint Christopher and Nevis[+]

1984 159 Members

Brunei Darussalam

1990 159 Members

Liechtenstein, Namibia

1991 166 Members

Democratic People's Republic of Korea, Estonia, Latvia, Lithuania, Marshall Islands, Federated States of Micronesia, Republic of Korea

1992 179 Members

Armenia, Azerbaijan, Bosnia and Herzegovina[+], Croatia[+], Georgia, Kazakhstan, Kyrgyzstan, Republic of Moldova, San Marino, Slovenia[+], Tajikistan, Turkmenistan, Uzbekistan

1993 184 Members

Andorra, Czech Republic[+], Eritrea, Monaco, Slovakia[+], The former Yugoslav Republic of Macedonia[+]

1994 185 Members

Palau

1999 188 Members

Kiribati, Nauru, Tonga

2000 189 Members

Federal Republic of Yugoslavia[+], Tuvalu

2002 191 Members

Switzerland, Timor-Leste

2006 192 Members

Montenegro[+]

2011 193 Members

South Sudan[+]