linguistic:paraphrasing
Politics and foreign relations

The Cook Islands are a representative democracy with a parliamentary system in an associated state relationship with New Zealand. Executive power is exercised by the government, with the Prime Minister as head of government. Legislative power is vested in both the government and the Parliament of the Cook Islands. While the country is de jure unicameral, there are two legislative bodies with the House of Ariki acting as a de facto upper house.

There is a multi-party system. The Judiciary is independent of the executive and the legislature. The head of state is the King of New Zealand, who is represented in the Cook Islands by the King's Representative.

The islands are self-governing in "free association" with New Zealand. Under the Cook Islands constitution, New Zealand cannot pass laws for the Cook Islands. Rarotonga has its own foreign service and diplomatic network. Cook Islands nationals have the right to become citizens of New Zealand and can receive New Zealand government services when in New Zealand, but the reverse is not true; New Zealand citizens are not Cook Islands nationals. Despite this, as of 2018, the Cook Islands had diplomatic relations in its own name with 52 other countries. The Cook Islands is not a United Nations member state, but, along with Niue, has had their "full treaty-making capacity" recognised by the United Nations Secretariat, and is a full member of the World Health Organization (WHO), UNESCO, the International Civil Aviation Organization, the International Maritime Organization and the UN Food and Agriculture Organization, all UN specialized agencies, and is an associate member of the United Nations Economic and Social Commission for Asia and the Pacific (UNESCAP) and a Member of the Assembly of States of the International Criminal Court.

The Cook Islands Ambassador to the International Maritime Organisation, Captain Ian Finley, has faced controversy for accepting $700,000 of undisclosed funding from a shipping industry lobby group run with his wife, at the same time as he was helping design environmental rules for the shipping industry.

Despite being one of the most vulnerable countries to climate change, the Cook Islands paradoxically opposed any measures to reduce greenhouse gas emissions from the shipping industry, according to Climate Home.

On 11 June 1980, the United States signed a treaty with the Cook Islands specifying the maritime border between the Cook Islands and American Samoa and also relinquishing any American claims to Penrhyn, Pukapuka, Manihiki, and Rakahanga. In 1990 the Cook Islands and France signed a treaty that delimited the boundary between the Cook Islands and French Polynesia. In late August 2012, United States Secretary of State Hillary Clinton visited the islands. In 2017, the Cook Islands signed the UN Treaty on the Prohibition of Nuclear Weapons. On 25 September 2023, the Cook Islands and the United States of America established diplomatic relations under the leadership of Prime Minister Mark Brown at a ceremony in Washington, DC.

In 2024, the Cook Islands' efforts to join the Commonwealth of Nations as a full member were "ongoing" but, despite this, the government was unable to secure an invitation to attend the 2024 Commonwealth Heads of Government Meeting in Samoa.