Roman Catholic Diocese of Srijem

Diocese of Syrmia Dioecesis Sirmiensis Епархија Сријема
Location
Country	Serbia
Ecclesiastical province	Đakovo-Osijek
Metropolitan	Archdiocese of Đakovo-Osijek
Statistics
Area	3,766 km2 (1,454 sq mi)
Population - Total - Catholics	(as of 2010) 800,000 50,000 (6.3%)
Information
Denomination	Roman Catholic
Sui iuris church	Latin Church
Rite	Roman Rite
Established	18 June 2008
Cathedral	Cathedral Basilica of St. Demetrius
Current leadership
Pope	Francis
Bishop	Đuro Gašparović
Metropolitan Archbishop	Đuro Hranić
Map
Map of organization of Roman Catholic Church in Serbia   Syrmia Bishopric - Grey

The Roman Catholic Diocese of Syrmia (Latin: Dioecesis Sirmiensis) is diocese of the Latin Rite of the Roman Catholic Church, in Serbia. It is subject to the Archdiocese of Đakovo-Osijek. The seat of the diocese is in Sremska Mitrovica.

It includes Serbian part of the region of Syrmia, which is administratively divided between the Autonomous Province of Vojvodina and the City of Belgrade.

The diocese includes adherents mainly from Croat and Hungarian ethnic communities.

Roman Catholic Diocese of Syrmia was created sometime after the final Hungarian conquest of the region of Syrmia at the end of 12th and the beginning of 13th century. In 1521, after the fall of Belgrade, the region of Syrmia was overrun by Ottoman Turks. Roman Catholic Church continued to appoint bishops for Syrmia, but they were living mainly outside their diocese. During the austro-turkish wars of (1683-1699) and (1716-1718), entire region of Syrmia was liberated from Turkish rule and incorporated into the Habsburg Monarchy. In 1773, the Diocese of Syrmia and Diocese of Bosnia and Đakovo were joined into a single enlarged diocese that was named the Diocese of Bosnia-Đakovo and Syrmia.

In 1918, the region was incorporated into newly formed Kingdom of Serbs, Croats and Slovenes, known as Yugoslavia. In 1945, region of Syrmia became part of Serbia within Yugoslavia. In 1963, name of the diocese was changed to Diocese of Đakovo or Bosnia and Syrmia. After the breakup of Yugoslavia (1991-1992) there were several initiatives towards the renewal of the separate Diocese of Syrmia.