Politics of Saint Lucia takes place in the framework of an independent parliamentary democratic constitutional monarchy, with King Charles III as its head of state, represented by a Governor General, who acts on the advice of the prime minister and the cabinet. The prime minister is the leader of the majority party of the house, and the cabinet conducts affairs of state. The Governor General exercises basically ceremonial functions, but residual powers, under the constitution, can be used at the governor general's discretion. The actual power in St. Lucia lies with the prime minister and the cabinet, usually representing the majority party in parliament.

The Parliament of Saint Lucia is the bicameral legislative branch of the government of Saint Lucia. It consists of the King, who is represented by the governor general), and the 2 parts of the legislature, the Senate and the House of Assembly.