Marko Lončar was born in 1998 in Teslić, Republika Srpska, Bosnia and Herzegovina. He has a degree in political science and is a master's student on the European Studies module at the Faculty of Political Sciences in Belgrade, Serbia. He founded the Youth Club Teslić, and has served as its president since its inception. He represents the Youth Council of Republika Srpska, Bosnia and Herzegovinal in the Council of Europe's Advisory Council on Youth and is a member of the Teslić Municipal Assembly's Committee for Youth and Population Policy.