Roman Catholic Archdiocese of Mechelen–Brussels
| Archdiocese of Mechelen–Brussels Archidioecesis Mechliniensis–Bruxellensis Aartsbisdom Mechelen-Brussel (in Dutch) Archidiocèse de Malines-Bruxelles (in French) | |
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| Coat of arms | |
| Location | |
| Country | Belgium | 
| Territory | Mechelen, the Brussels-Capital Region, Flemish Brabant and Walloon Brabant | 
| Ecclesiastical province | Mechelen-Brussels | 
| Coordinates | 51°1′48.4″N 4°28′43.6″E / 51.030111°N 4.478778°E | 
| Statistics | |
| Area | 3,700 km2 (1,400 sq mi) | 
| Population 
 
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| Parishes | 593 | 
| Information | |
| Denomination | Catholic Church | 
| Sui iuris church | Latin Church | 
| Rite | Roman Rite | 
| Established | 12 May 1559 | 
| Cathedral | St. Rumbold (Mechelen) (Primatial cathedral) | 
| Co-cathedral | St. Michael and Gudula (Brussels) | 
| Patron saint | Saint Rumbold of Mechelen | 
| Secular priests | 1812 | 
| Current leadership | |
| Pope | Leo XIV | 
| Archbishop | Luc Terlinden | 
| Suffragans | Antwerp Bruges Ghent Hasselt Namur Tournai Liège | 
| Auxiliary Bishops | Jean Kockerols Jean-Luc Hudsyn Koenraad Vanhoutte | 
| Vicar General | Etienne Van Billoen | 
| Bishops emeritus | André-Joseph Léonard Jan De Bie Jozef De Kesel | 
| Map | |
| Territorial extent of the Archidiocese of Mechelen-Brussels | |
| Website | |
| www | |
| Source Annuario Pontificio 2007 | |
The Archdiocese of Mechelen–Brussels (Latin: Archidioecesis Mechliniensis–Bruxellensis) is a Latin Church ecclesiastical territory or archdiocese of the Catholic Church in Belgium. It is the primatial see of the whole of Belgium. Additionally it is the centre of the local ecclesiastical province governed by the Archbishop of Mechelen–Brussels, which covers the middle of the country corresponding to the now defunct Belgian Province of Brabant and a few other municipalities adjacent to it.
The Archdiocese was formed in 1559, and the bishop has a seat in two cathedrals, St. Rumbold's Cathedral in Mechelen and the Cathedral of St. Michael and St. Gudula in Brussels. The current archbishop is Luc Terlinden, who was installed in September 2023.