The Apostolic Exarchate of Serbia and Montenegro is an ecclesiastical jurisdiction for Eastern Catholics of the Byzantine Rite in Serbia and Montenegro, founded in 2003. It is part of the Byzantine Church of Croatia, Serbia and Montenegro.
After the formation of independent republics from what had been Yugoslavia, in 2003 Pope John Paul II created a separate Apostolic Exarchate for Byzantine Rite Greek Catholics in Serbia and Montenegro, out of territory which had formerly belonged to the Eparchy of Križevci, which is based in Croatia. The new jurisdiction, the Apostolic Exarchate of Serbia and Montenegro has its see in Ruski Krstur in Vojvodina province. The first exarch is Đura Džudžar (Дюра Джуджар). The Exarchate is still associated with the Eparchy of Križevci as part of the Byzantine Church of Croatia, Serbia and Montenegro, unlike the separate Apostolic Exarchate that was formed in Macedonia in 2003 and that is classified in the Annuario Pontificio as a separate particular Church. Adherents of the Eastern Catholic Byzantine Rite in Serbia are mainly ethnic Rusyns.