The Cook Islands are a constitutional monarchy within the Realm of New Zealand. Under the Cook Islands Constitution, the Sovereign in Right of New Zealand has been Head of State of the Cook Islands since 4 August 1965. The Sovereign is represented by the King's Representative; as such, the King is the de jure head of state, holding several powers that are his alone, while the King's Representative is sometimes referred to as the de facto head of state. The viceregal position is currently held by Tom Marsters.

The Cook Islands is an island country in Polynesia, part of Oceania in the South Pacific Ocean. It consists of 15 islands whose total land area is approximately 236.7 square kilometres (91 sq mi). The Cook Islands' Exclusive Economic Zone (EEZ) covers 1,960,027 square kilometres (756,771 sq mi) of ocean. Avarua is its capital.