The Supreme Governor of the Church of England is the titular head of the Church of England, a position which is vested in the British monarch. Although the monarch's authority over the Church of England is largely ceremonial and is mostly observed in a symbolic capacity, the position is still relevant to the established church. As the supreme governor, the monarch formally appoints high-ranking members of the church on the advice of the prime minister of the United Kingdom, who in turn acts on the advice of the Crown Nominations Commission. Since the Act of Settlement of 1701, all Supreme Governors have been members of the Church of England.

The Church of England is the established Christian Church in England and the Crown Dependencies. It is the origin of the Anglican tradition, which combines features of both Reformed and Catholic Christian practices. Its adherents are called Anglicans.