Roman Catholic Diocese of Trincomalee
Diocese of Trincomalee Dioecesis Trincomaliensis திருகோணமலை மட்டக்களப்பு மறைமாவட்டத்தின்  | |
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| Location | |
| Country | Sri Lanka | 
| Ecclesiastical province | Colombo | 
| Metropolitan | Colombo | 
| Statistics | |
| Area | 8,397 km2 (3,242 sq mi) | 
Population
 
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| Information | |
| Denomination | Roman Catholic | 
| Rite | Latin Rite | 
| Established | 25 August 1893 | 
| Cathedral | St. Mary’s Cathedral, Trincomalee | 
| Current leadership | |
| Pope | Leo XIV | 
| Bishop | Noel Emmanuel | 
| Metropolitan Archbishop | Malcolm Ranjith | 
| Bishops emeritus | Kingsley Swampillai | 
The Diocese of Trincomalee (Latin: Dioecesis Trincomaliensis) is a Roman Catholic diocese for eastern Sri Lanka. The current bishop is Noel Emmanuel.