The Commonwealth is a club of 56 countries that are home to about a third of the world’s population. Most were once part of the British Empire, but not all of them: some members were never ruled by Britain at all. Here are 15 facts about the Commonwealth of Nations, from how it began to who leads it today.
The Commonwealth at a glance
Full name: the Commonwealth of Nations
Members: 56 countries
Population: about 2.7 billion people
Head: King Charles III
Headquarters: Marlborough House, London
Commonwealth Day: the second Monday in March
1It is a voluntary association of 56 countries.
The Commonwealth is a group of independent countries that have agreed to work together on shared values such as democracy, human rights and the rule of law. Any member can leave at any time, and none is ruled by another.
2It covers about a third of the world’s people.
Around 2.7 billion people live in Commonwealth countries, roughly a third of the global population. India alone accounts for more than half of them.
3Most of its people are young.
About 60% of people in the Commonwealth are under 30, which makes it one of the youngest groups of countries in the world.
4Most members are small countries.
Thirty-three of the 56 members are classed as small states, with populations of 1.5 million or less. Many are island nations in the Caribbean and the Pacific, such as Nauru, Tuvalu and St Lucia.
5The modern Commonwealth began in 1949.
An earlier British Commonwealth grew out of the Empire in the 1920s and 1930s. The modern Commonwealth was created by the London Declaration of 1949, which allowed India to stay a member as a republic. The word “British” was dropped from the name.
6Some members were never British colonies.
Mozambique joined in 1995 and Rwanda in 2009, even though neither had been ruled by Britain. Gabon and Togo, both former French territories, joined in 2022.
7The King is its head, but it isn’t hereditary.
King Charles III is Head of the Commonwealth, a symbolic role. It doesn’t pass automatically to the British monarch: in 2018, Commonwealth leaders agreed that Charles would follow Queen Elizabeth II in the role.
8The King is head of state of only 15 members.
Countries where the King is also head of state are called Commonwealth realms. There are 15, including the UK, Canada, Australia, New Zealand and Jamaica. Barbados became a republic in 2021 but stayed in the Commonwealth.
9Countries have left, and come back.
Ireland left in 1949, South Africa left in 1961 over apartheid and returned in 1994, and Zimbabwe left in 2003. The Gambia and the Maldives both left and later rejoined.
10Members can be suspended.
Countries that break the Commonwealth’s values, for example after a military coup, can be suspended. Fiji, Nigeria and Pakistan have all been suspended in the past.
11It has its own charter.
The Commonwealth Charter, signed by Queen Elizabeth II in 2013, sets out 16 shared values, from democracy and free speech to sustainable development and gender equality.
12Its leaders meet every two years.
The heads of government of all members gather roughly every two years at a summit known as CHOGM, the Commonwealth Heads of Government Meeting. The 2024 meeting was held in Samoa, the first in a Pacific island nation.
13It has its own sporting event.
The Commonwealth Games began as the British Empire Games in Hamilton, Canada, in 1930. They are held every four years, and Glasgow hosted the 2026 Games in a smaller format with ten sports.
14Commonwealth Day is in March.
Commonwealth Day is celebrated on the second Monday in March, with a service at Westminster Abbey attended by members of the royal family.
15Its members share more than history.
Most Commonwealth countries use English for government and business and have similar legal systems, which studies suggest makes trade between members cheaper. Members also send High Commissioners, rather than ambassadors, to each other.
FAQs about the Commonwealth
How many countries are in the Commonwealth?
56, across Africa, Asia, the Americas, Europe and the Pacific.
Does the King rule the Commonwealth countries?
No. Every member is independent. The King is the symbolic Head of the Commonwealth and is head of state of only 15 of the 56 countries.
Is the USA in the Commonwealth?
No. Although it was once a group of British colonies, the United States has never been a member.
What is the difference between the Commonwealth and the Commonwealth Games?
The Commonwealth is the association of countries; the Commonwealth Games is the multi-sport event that its members and territories compete in every four years.
Sources and further reading
Explore more: facts about the British Empire.
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