In this final paper, the topic "Political parties in the Republic of Croatia" will be discussed, in which the concept and historical development of political parties, their tasks and their division into left, right and center will be discussed. Political parties are interest-based political organizations of citizens that are established for the purpose of articulating individual interests, shaping political will, fighting for power in elections and organizing state life in the event of election victory. In the 19th century, political parties were formed in most European countries. They are an expression of the establishment of elected parliaments as the legislative power in the country. The importance of political parties can only be recognized from the structure of the liberal state and its relationship to society. Political parties are created as an expression of the need to articulate and express various social interests through influence on state power. Striving to gain democratic legitimacy for the exercise of state functions through the electoral struggle in mutual competition, the parties generalize special interests, giving them a form acceptable to as many members of the community as possible.