Main opposition bloc Nation Alliance’s presidential candidate and Republican People’s Party (CHP) leader Kemal Kılıçdaroğlu casted his vote in Arjantin Primary School in the capital Ankara.
"You will see that we will win, I trust the will of the people. Surely democracy will come to this country, freedom will come," Kılıçdaroğlu said.
He received 44.88% of the votes in the first round.
CHP's Istanbul Mayor and Nation Alliance vice presidential candidate Ekrem İmamoğlu casted his vote in Istanbul's Beylikdüzü district.
"We were faced with terrrible slanders (during the election campaign). I wouldn't want any of these. It hurts me, I can't lie about anyone, I can't slander," İmamoğlu said.
Kılıçdaroğlu's ally, right-wing Good (İYİ) Party leader Meral Akşener casted her vote in Istanbul's Üsküdar district.
"The election is very important especially for the future of the youth. I hope it will be good for our country and our nation. May God grant us what is in our hearts," she said.
Opposition Peoples' Democratic Party (HDP) co-chair Mithat Sancar casted his vote in the capital Ankara. The HDP endorsed Kılıçdaroğlu against Erdoğan in both rounds.
"Everyone should go to the polls and vote, because this is not just a presidential election. We vote for Turkey's future. I believe that it will lead to a bright future. Voting is not enough. We expect voters to act like ballot box officers. Voters must fulfill their duty until the last moment to protect their votes and will. Tomorrow we will wake up to another day. We will start walking the road to a new beginning together," he said