The monarchy of Papua New Guinea is a system of government in which a hereditary monarch is the sovereign and head of state of Papua New Guinea. The current monarch, since 16 September 1975, is Queen Elizabeth II.
Although the person of the sovereign is equally shared with fifteen other independent countries within the Commonwealth of Nations, each country's monarchy is separate and legally distinct. As a result, the current monarch is officially titled the Queen of Papua New Guinea and, in this capacity, she, her consort, and other members of the Royal Family undertake public and private functions domestically and abroad as representatives of the Papua New Guinean state. However, the Queen is the only member of the Royal Family with any constitutional role. The Queen lives predominantly in the United Kingdom and, while several powers are the sovereign's alone, most of the royal governmental and ceremonial duties in Papua New Guinea are carried out by the Queen's representative, the governor-general.