Stephen II (Croatian: Stjepan, Hungarian: István; 1190/95 – 10 July 1247) was a Croatian–Hungarian prelate of the Catholic Church who served as Bishop of Zagreb from 1225 until his death in 1247.

[1] Croatian historian Ivan Kukuljević Sakcinski thought that Stephen originated from the Babonić noble family, which argument was also accepted by a majority of scholars in Croatia, including Neven Budak and Lejla Dobronić.

[2] In contrast, Baltazar Adam Krčelić regarded him as a relative of Prince Coloman and kings Andrew II and Béla IV.

He was altogether content to be raised and exalted by the winds of popular favor.He styled himself as "Stephanus secundus" in order to distinguish himself from his immediate namesake predecessor.

The foundation of Franciscan, Dominican, Cistercian and Pauline monasteries in Zagreb, Čazma, Virovitica and Ivanić Grad contributed to this advancement.

Influenced by his experience in Paris (or Bologna), Stephen II contributed to the education of local clergy and published Liber quaestionum et sententiarum (the Book of Questions and Meanings).

Inspired by the ascetic life of the Franciscans and Dominicans, Stephen II solved the issue of the tithe on the benefit of the poor strata.

[15] Upon Stephen's request, Pope Gregory IX confirmed the former land donations of kings Emeric and Andrew II to the diocese in July 1227.

[12] Historian Csaba Juhász analyzed the unique arenga (prelude) of the founding diploma of the Čazma Chapter, which paraphrases much of wisdom from the works of Saint Gregory the Great.

They reflect still informal forms and do not have a date or place of publication, but their emergence in the newly established episcopal office in itself testifies to the role played by Stephen in the field of literacy.

[13] Coloman already initiated the merger of the Archbishopric of Split and the Bishopric of Zagreb, which would have extracted the latter diocese from the administration of the Hungarian ecclesiastical organization.

However, Pope Gregory IX reminded him in June 1240, that the two dioceses could not be united without the consent of the archbishop of Kalocsa – superior of the bishop of Zagreb – and the chapters of their sees.

"Feeling the material and spiritual losses suffered by the church", Stephen confirmed the inhabitants of the town of Zagreb and the guest peoples of the nearby Latin (i.e. Italian or Dalmatian) district belonging to it in their original freedom.