| Diocese of Dacia Dioecesis Daciarum Διοίκησις Δακίας | |
|---|---|
| Diocese of the Roman Empire | |
| ca. 337 – ca. 602 | |
 Dioceses of Dacia and Thrace in 400 AD | |
| Capital | Serdica (modern Sofia) |
| Historical era | Late Antiquity |
• Split from Diocese of Moesia | ca. 337 |
• Merged into the newly formed Praetorian prefecture of Illyricum | 357 |
• Merged into the Praetorian prefecture of Italy | 384 |
• Merged back into Illyricum after Theodosius' death | 395 |
| ca. 602 | |
The Diocese of Dacia (Latin: Dioecesis Daciae) was a diocese of the later Roman Empire, in the area of modern western Bulgaria, central Serbia, Montenegro, Kosovo, northern Albania and northern North Macedonia. It was subordinate to the Praetorian prefecture of Illyricum. Its capital was at Serdica (modern Sofia).