State and official visits to the United Kingdom

State and official visits to the United Kingdom are formal visits by a head of state of a country to the United Kingdom and are hosted by the British Sovereign. They are royal events using assets of the Civil Service, the Royal Household and the Household Division. Usually other members of the Royal Family participate, with activities centred on London. Formal invitations are sent by the Royal Household via the Foreign and Commonwealth Office.

There are no formal State visits between the United Kingdom and the 14 other Commonwealth realms, as the realms all share a common monarch and head of state. Visits conducted by the monarch to another Commonwealth realm are also not considered state visits but rather royal visits. In addition, official visits to the United Kingdom by another Commonwealth realm are typically performed by their respective governor general, who in that capacity is usually in the country for an audience with the King.