A Commonwealth realm is any one of 16 sovereign states within the Commonwealth of Nations with Elizabeth II as their respective monarch. blank">Buckingham Palace: Queen and Commonwealth These countries, with a combined area totalling 18.8 million km² (excluding Antarctic claims), and with a combined population of 131 million, are independent kingdoms in personal union, with the one sovereign being separately and equally monarch of each state. While the term Dominion has never been officially revoked, it has been replaced by use of the word realm, beginning in the 1950s, so as to reflect the relationship of equality amongst all sixteen countries.

The Commonwealth realms are each members of, but distinguished from, the _Commonwealth of Nations, which is an organisation of mostly former British colonies. Within the Commonwealth, there is no difference in status between the Commonwealth realms and other Commonwealth members.