The politics of Antigua and Barbuda takes place in a framework of a unitary parliamentary representative democratic monarchy, wherein the sovereign of Antigua and Barbuda is the head of state, appointing a governor-general to act as vice-regal representative in the nation. A prime minister is appointed by the governor-general as the head of government, and of a multi-party system; the prime minister advises the governor-general on the appointment of a Council of Ministers. Executive power is exercised by the government. Legislative power is vested in both the government and the two chambers of the Parliament. The bicameral Parliament consists of the Senate and the House of Representatives.

The Senate is the Upper House of Parliament of Antigua and Barbuda. It consists of 17 members appointed by the Governor General. Ten members are appointed on the advice of the Prime Minister, four on the advice of the Leader of the Opposition, one on the advice of the Barbuda Council, one resident of Barbuda on the advice of the Prime Minister, and one at the Governor General's discretion. Subject to the provisions of Section 30 of the Constitution, any person who at the time of his appointment: is a citizen; is twenty-one years of age or older; has lived in Antigua and Barbuda for the twelve months immediately prior to the date of his appointment; and is able to speak and, unless disabled by blindness or another physical condition, to read the English language with enough proficiency to allow him to take an active part in the proceedings.