The politics of Trinidad and Tobago function within the framework of a unitary state regulated by a parliamentary democracy modelled on that of the United Kingdom of Great Britain and Northern Ireland, from which the country gained its independence in 1962. Under the 1976 republican Constitution, the monarch was replaced as head of state by a President chosen by an electoral college composed of the members of the bicameral Parliament, consisting of the Senate and the House of Representatives.

The Parliament of Trinidad and Tobago is the legislative branch of the Government of Trinidad and Tobago. The Parliament is bicameral. Besides the President of Trinidad and Tobago, it is composed of the House of Representatives, which is composed of the Speaker of the House of Representatives in addition to 41 directly elected members serving a five-year term in single-seat constituencies, and the Senate which has 31 members appointed by the President: 16 Government Senators appointed on the advice of the Prime Minister, 6 Opposition Senators appointed on the advice of the Leader of the Opposition and 9 Independent Senators appointed by the President to represent other sectors of civil society. It is at present the only parliament in the world with an incumbent female President, President of the Senate, Speaker of the House of Representatives and Leader of the Opposition and made history by appointing the Caribbean's first and only transgender parliamentarian on 15 February 2022. As of 20 April 2021, there are only 24 female members, or 32.9% and eight members born in Tobago or 11.0%.