with U.S. Secretary of State
Hillary Clinton in Rarotonga, 31 August 2012 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
of New Zealand, who is
represented in the Cook Islands by the
'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, , 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 specialised 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. 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. In 2025, prime minister Mark Brown said that the Cook Islands did not meet the requirements for UN membership and foreign minister
Tingika Elikana said that any decision to join the UN would require a referendum and reevaluation of the relationship with New Zealand. Brown also confirmed that at the Commonwealth of Nations the Cook Islands is considered to be represented by the
Realm of New Zealand, meaning that they would not have their own separate representation unless they become fully sovereign. Additionally, in response to a push to introduce Cook Island passports and agreements made with China, a spokesperson for New Zealand foreign minister
Winston Peters stated, "Unlike
Samoa,
Tonga and
Tuvalu, the Cook Islands is not a fully independent and sovereign state", unless its status and relationship with New Zealand are changed by referendum.
Defence and police The
Cook Islands Police Service polices the waters, and shares responsibility for defence with New Zealand, in consultation with the Cook Islands Government and at its request. The total offshore EEZ is about 2 million square kilometres. Vessels of the
Royal New Zealand Navy can be employed for this task including its s. These naval forces may also be supported by
Royal New Zealand Air Force aircraft, including
P-8 Poseidons. However, these forces are limited in size and in 2023 were described by the Government as "not in a fit state" to respond to regional challenges. New Zealand's subsequently announced "Defence Policy and Strategy Statement" noted that shaping the security environment, "focusing in particular on supporting security in and for the Pacific" would receive enhanced attention. The Cook Islands Police Service is the police force of the Cook Islands. The Maritime Wing of the Police Service exercises sovereignty over the nation's EEZ. Vessels have included a , commissioned in May 1989 which received a re-fit in 2015 but was withdrawn from service and replaced by a larger and more capable , , which entered service in 2022. Cook Islands has its own customs regulations.
Human rights Formerly, male homosexuality was
de jure illegal in the Cook Islands and was punishable by a maximum term of seven years imprisonment; however, the law was never enforced. In 2023, legislation was passed which legalised homosexuality.
Local government There are island councils, each headed by a mayor, on all of the inhabited outer islands (Outer Islands Local Government Act 1987 with amendments up to 2004, and Palmerston Island Local Government Act 1993) except
Nassau, which is governed by
Pukapuka (
Suwarrow, with only one caretaker living on the island, also governed by Pukapuka, is not counted with the inhabited islands in this context). , 1997–2008 , subdivided into 54 traditional
tapere Three vaka councils headed by mayors were established on
Rarotonga by the Rarotonga Local Government Act 1997, then abolished in February 2008, despite much controversy. On the lowest level, there are village committees.
Nassau, which is governed by
Pukapuka, has an island committee (Nassau Island Committee), which advises the Pukapuka Island Council on matters concerning its own island. ==Economy==