The governor-general of Papua New Guinea is the representative of the Papua New Guinean monarch, currently King Charles III, in Papua New Guinea. The governor-general is appointed by the monarch after their nomination by the National Parliament by vote. The functions of the governor-general include appointing ministers, judges, and ambassadors; and issuing writs for election.

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 Papua New Guinean monarch and head of state, since 8 September 2022, is King Charles III. As sovereign, he is the personal embodiment of the Papua New Guinean Crown. Although the person of the sovereign is equally shared with 14 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 King of Papua New Guinea and, in this capacity, he and other members of the royal family undertake public and private functions domestically and abroad as representatives of Papua New Guinea. However, the King is the only member of the royal family with any constitutional role.