The polling stations opened Sunday at 7 a.m. local time (6:00 GMT). As of 11:30 a.m. local time (10:30 GMT), the turnout stood at 21.92 percent, while during the first round of election held two weeks ago, the turnout reached only 13.19 percent.
Stations will be open until 7 p.m. local time (18:00 GMT) with the preliminary results expected by 19:00 GMT. Almost 3,8 million Croatian citizens are entitled to vote.
The election commission has reported no significant incidents during the election.
The Croatian president is elected for a term of five years. The first round of the vote with four candidates was held on December 28, 2014. Since none of the candidates received more than 50 percent of the votes, the second round was appointed with the participation of the two most popular politicians.
The second round of election is a run-off between the Balkan country's incumbent president Ivo Josipovic, who is a Social Democrat, and Kolinda Grabar-Kitarovic, NATO's Assistant Secretary General for Public Diplomacy, representing the country's main opposition party Croatian Democratic Union.