[2] Stjepan Krasić was born in Čitluk, in what was then the Kingdom of Yugoslavia (present Bosnia and Herzegovina) to Ivan and Luce née Pervan.

After serving a military service, from 1960 he studied philosophy in Dubrovnik and theology in Zagreb and at the Pontifical University of Saint Thomas Aquinas in Rome.

[1][3] In addition to the theological study, Krasić also attended the Vatican School of Palaeography, Diplomatics and Archive Administration.

Krasić received his first doctorate at the Pontifical University of Saint Thomas Aquinas making a historical dissertation on the subject of the Dominican Congregation of Dubrovnik in 1970.

Based on that discovery the Croatian Parliament in 2003 awarded the title of the university to the Faculty of Humanities in Zadar.