The Senate of Trinidad and Tobago is the appointed upper house of the bicameral Parliament of Trinidad and Tobago, along with the President and House of Representatives of Trinidad and Tobago. The Senate currently sits at the Red House. The Senate has 31 members all 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 on the discretion of the President from outstanding persons who represent other sectors of civil society. The presiding officer, the President of the Senate, is elected from among the Senators who are not Ministers or Parliamentary Secretaries. A senator must be at least 25 years old and a citizen of Trinidad and Tobago. The current President of the Senate is Senator Nigel de Freitas. As of 20 April 2021, there are only 13 female senators, or 41.9% and 6 Tobagonian senators or 19.4%. The Senate made history on 15 February 2022 by appointing Jowelle de Souza as an acting opposition senator, thus making her the Caribbean's first and only transgender parliamentarian.

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%.