The prime minister of the Cook Islands is the head of government of the Cook Islands, a self-governing territory in free association with New Zealand. The office was established in 1965, when self-government was first granted to the islands. Originally, the title "Premier" was used, but this was replaced by the title of "Prime Minister" in 1981.

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.