The politics of Croatia are defined by a parliamentary, representative democratic republic framework, where the Prime Minister of Croatia is the head of government in a multi-party system. Executive power is exercised by the Government and the President of Croatia. Legislative power is vested in the Croatian Parliament. The Judiciary is independent of the executive and the legislature. The parliament adopted the current Constitution of Croatia on 22 December 1990 and decided to declare independence from Yugoslavia on 25 May 1991. The Constitutional Decision on the Sovereignty and Independence of the Republic of Croatia came into effect on 8 October 1991. The constitution has since been amended several times. The first modern parties in the country developed in the middle of the 19th century, and their agenda and appeal changed, reflecting major social changes, such as the breakup of Austria-Hungary, the Kingdom of Serbs, Croats and Slovenes, dictatorship and social upheavals in the kingdom, World War II, the establishment of Communist rule and the breakup of the SFR Yugoslavia.

The prime minister of Croatia, officially the president of the government of the Republic of Croatia, is Croatia's head of government, and is de facto the most powerful and influential state officeholder in the Croatian system of government. Following the first-time establishment of the office in 1945, the 1990–2000 semi-presidential period is the only exception where the president of Croatia held de facto executive authority. In the formal Croatian order of precedence, however, the position of prime minister is the third highest state office, after the president of the Republic and the speaker of the Parliament.