The Eparchy of San Nicola di Ruski Krstur (Serbian: Крстурска гркокатоличка епархија) is a Greek Catholic Church of Croatia and Serbia ecclesiastical territory or eparchy of the Catholic Church in Serbia.

[3] The Eparchy of Ruski Krstur mostly serves a group of Rusyn Greek Catholics in the region of Vojvodina.

[4] Until 2001, the Greek Catholic Eparchy of Križevci had full jurisdiction over all Eastern Catholics of the Byzantine Rite throughout the entire territory of the former Yugoslavia, including all of its successor states: Croatia, Slovenia, Bosnia-Herzegovina, Serbia, Montenegro and North Macedonia.

After the formation of independent successor states from what had been Yugoslavia, the process of administrative reorganization was initiated.

Adherents of the Eastern Catholic Byzantine Rite in Serbia are mainly Rusyns,[4] Ukrainians, and Rumanians[citation needed].