The 56 member states of the Commonwealth, which is also called Commonwealth of Nations, encompass the United Kingdom and 55 of its former dependencies. After becoming independent, these 55 states have chosen to work with one another and with the United Kingdom in cooperation while also recognizing the British monarch as their symbolic head.
Four states (Maldives, Nauru, Tuvalu, and Saint Vincent and the Grenadines) were first admitted to the Commonwealth as special members, meaning that their membership came with limitations, such as their exclusion from certain government meetings; however, these states were later granted full membership. Five states (Maldives, South Africa, Pakistan, The Gambia, and Fiji) left the Commonwealth for a time before rejoining. Ireland is the only state to date that has withdrawn from the Commonwealth and has not rejoined. Several former possessions of the British Empire—including Afghanistan, Burma (now Myanmar), Egypt, Sudan (which was later split into Sudan and South Sudan), and the 13 colonies that became the United States—never joined the Commonwealth.
| country | date of Commonwealth membership |
|---|---|
| United Kingdom | 1931 |
| Canada | 1931 |
| Australia | 1931 |
| New Zealand | 1931 |
| South Africa | 1931 (left in 1961; rejoined 1994) |
| India | 1947 |
| Pakistan | 1947 (left in 1972; rejoined 1989) |
| Sri Lanka (formerly Ceylon) | 1948 |
| Ghana | 1957 |
| Malaysia (formerly Malaya) | 1957 |
| Nigeria | 1960 |
| Cyprus | 1961 |
| Sierra Leone | 1961 |
| Tanzania | 1961 (Tanganyika in 1961; Tanzania in 1964 upon union with Zanzibar [member 1963]) |
| Jamaica | 1962 |
| trinidad and Tobago | 1962 |
| Uganda | 1962 |
| Kenya | 1963 |
| Malawi | 1964 |
| Malta | 1964 |
| Zambia | 1964 |
| the Gambia | 1965 (left in 2013; rejoined 2018) |
| Singapore | 1965 |
| Guyana | 1966 |
| Botswana | 1966 |
| Lesotho | 1966 |
| Barbados | 1966 |
| Mauritius | 1968 |
| Nauru | 1968 (joined as special member; full member since 1999) |
| Swaziland | 1968 |
| Tonga | 1970 |
| Samoa (formerly Western Samoa) | 1970 |
| Fiji | 1970 (left in 1987; rejoined 1997) |
| Bangladesh | 1972 |
| the Bahamas | 1973 |
| Grenada | 1974 |
| Papua New Guinea | 1975 |
| Seychelles | 1976 |
| Solomon Islands | 1978 |
| Tuvalu | 1978 (joined as special member; full member since 2000) |
| Dominica | 1978 |
| Kiribati | 1979 |
| Saint Lucia | 1979 |
| Saint Vincent and the Grenadines | 1979 (joined as special member; full member since 1985) |
| Vanuatu | 1980 |
| Belize | 1981 |
| Antigua and Barbuda | 1981 |
| Maldives | 1982 (joined as special member; became full member in 1985; left in 2016; rejoined in 2020) |
| Saint Kitts and Nevis | 1983 |
| Brunei | 1984 |
| Namibia | 1990 |
| Cameroon | 1995 |
| Mozambique | 1995 |
| Rwanda | 2009 |
| Gabon | 2022 |
| Togo | 2022 |