In the Republic of Croatia, elections for the Croatian Parliament and local elections are held every four years, while the elections for the President of the Republic of Croatia and elections for the members of the European Parliament from the Republic of Croatia are held every five years. The aim of this paper, through a parallel presentation of individual elections, is to determine the similarities and differences between them. Members of the Croatian Parliament, members of the European Parliament from the Republic of Croatia as well as the members of the representative bodies of local and regional self-government units are elected by a proportional electoral system using D'Hondt's method of converting voters' votes. The condition for participating in the division of mandates is that the candidate list has crossed the election threshold, i.e. that it has won at least 5% of the valid votes. The President of the Republic of Croatia, municipal mayors, mayors and county prefects are elected by the majority electoral system, that is through the absolute majority system in a milder version, according to which an absolute majority (half plus one) of all voters who voted is required to win the first election round. Given that in practice such a majority is seldom achieved in the first election round, a second round of elections is held 14 days after the first round. The two candidates who received the largest number of votes in the first election round qualify for the second round, and the candidate who receives the most votes from the voters who have voted is therefore elected. Authorized proposers of candidates/candidate lists in all previously mentioned elections are political parties registered in the Republic of Croatia as well as voters. Regardless of the elections in question, the right to vote in the Republic of Croatia is universal, equal, secret, and direct. A prerequisite for exercising the right to vote in elections is the registration of voters on the Electoral Roll - a collection of personal data on all voters who are citizens of the Republic of Croatia and citizens of EU member states who exercise their right to vote in the Republic of Croatia.