| Name: | The Commonwealth |
| Former name: | 1931-1949 - British Commonwealth of Nations |
| Foundation date: | 31 December 1931 |
| Headquarters: | London (United Kingdom) |
|
Flag of the Commonwealth |
| 31 December 1931 | United Kingdom,
Australia,
Canada,
Ireland (withdrew 18 April 1949),
New Zealand,
South Africa (withdrew 31 May 1961, rejoined 1 June 1994) |
| 15 October 1947 | |
| 4 February 1948 | Ceylon (since 1972 - Sri Lanka) |
| 6 March 1957 | Ghana |
| 31 August 1957 | Malaya (since 1963 - Malaysia) |
| 1 October 1960 | Nigeria (membership suspended 11 November 1995 - 29 May 1999) |
| 31 March 1961 | Cyprus |
| 27 April 1961 | Sierra Leone |
| 9 December 1961 | Tanganyika (since 1964 - Tanzania) |
| 6 August 1962 | Jamaica |
| 31 August 1962 | Trinidad and Tobago |
| 9 October 1962 | Uganda |
| 12 December 1963 | Kenya |
| 6 July 1964 | Malawi |
| 21 September 1964 | Malta |
| 24 October 1964 | Zambia |
| 18 February 1965 | Gambia |
| 15 October 1965 | Singapore |
| 26 May 1966 | Guyana |
| 30 September 1966 | Botswana |
| 4 October 1966 | Lesotho |
| 30 November 1966 | Barbados |
| 12 March 1968 | Mauritius |
| 6 September 1968 | Swaziland |
| 1 November 1968 | Nauru (special membership until 1 May 1999) |
| 4 June 1970 | Tonga |
| 28 August 1970 | Western Samoa (since 1997 - Samoa) |
| 10 October 1970 | Fiji (withdrew 15 October 1987, rejoined 30 September 1997) |
| 18 April 1972 | Bangladesh |
| 10 July 1973 | Bahamas |
| 7 February 1974 | Grenada |
| 16 September 1975 | Papua New Guinea |
| 28 June 1976 | Seychelles |
| 7 July 1978 | Solomon Islands |
| 1 October 1978 | Tuvalu (special membership until 1 September 2000) |
| 3 November 1978 | Dominica |
| 22 February 1979 | Saint Lucia |
| 12 July 1979 | Kiribati |
| 27 October 1979 | Saint Vincent and the Grenadines (special membership until 1 June 1985) |
| 18 April 1980 | Zimbabwe (membership suspended 19 March 2002) |
| 30 July 1980 | Vanuatu |
| 21 September 1981 | Belize |
| 1 November 1981 | Antigua and Barbuda |
| 9 July 1982 | Maldives (special membership until 1 June 1985) |
| 19 September 1983 | Saint Kitts and Nevis |
| 1 January 1984 | Brunei |
| 21 March 1990 | Namibia |
| 1 November 1995 | Cameroon |
| 12 November 1995 | Mozambique |
