The Crown Dependencies are self-governing possessions of the British Crown, as opposed to overseas territories of the United Kingdom. They comprise the Channel Island Bailiwicks of Jersey and Guernsey in the English Channel, and the Isle of Man in the Irish Sea.

Being independently administered jurisdictions, none forms part of the United Kingdom nor of the European Union.

"The Crown" is defined differently in each Crown Dependency. In Jersey, statements in the 21st century of the constitutional position by the Law Officers of the Crown define it as the "Crown in right of Jersey", with all Crown land in the Bailiwick of Jersey belonging to the Crown in right of Jersey and not to the Crown Estate of the United Kingdom. Legislation of the Isle of Man defines the "Crown in right of the Isle of Man" as being separate from the "Crown in right of the United Kingdom". In Guernsey, legislation refers to the "Crown in right of the Bailiwick", and the Law Officers of the Crown of Guernsey submitted that "The Crown in this context ordinarily means the Crown in right of the république of the Bailiwick of Guernsey" and that this comprises "the collective governmental and civic institutions, established by and under the authority of the Monarch, for the governance of these Islands, including the States of Guernsey and legislatures in the other Islands, the Royal Court and other courts, the Lieutenant Governor, Parish authorities, and the Crown acting in and through the Privy Council." This constitutional concept is also worded as the "Crown in right of the Bailiwick of Guernsey".

Elizabeth II (Elizabeth Alexandra Mary; born 21 April 1926) is the constitutional monarch of 16 sovereign states known as the Commonwealth realms, and head of the 54-member Commonwealth of Nations. She is also head of state of the Crown Dependencies.

Elizabeth was born in London, and educated privately at home. Her father acceded to the throne as George VI in 1936 on the abdication of his brother Edward VIII. She began to undertake public duties during the Second World War, in which she served in the Auxiliary Territorial Service. On the death of her father in 1952, she became Head of the Commonwealth and queen regnant of seven independent Commonwealth countries: the United Kingdom, Canada, Australia, New Zealand, South Africa, Pakistan, and Ceylon. Her coronation service in 1953 was the first to be televised. Between 1956 and 1992, the number of her realms varied as territories gained independence and some realms became republics. Today, in addition to the first four aforementioned countries, Elizabeth is Queen of Jamaica, Barbados, the Bahamas, Grenada, Papua New Guinea, the Solomon Islands, Tuvalu, Saint Lucia, Saint Vincent and the Grenadines, Belize, Antigua and Barbuda, and Saint Kitts and Nevis.