| Jurisdiction: | Archdiocese |
| Bangalore | |
| Latin: | Archidioecesis Bangalorensis ಬೆಂಗಳೂರು ಮಹಾಧರ್ಮಕ್ಷೇತ್ರ |
| Country: |  India |
| Province: | Bangalore |
| Area Km2: | 29,950 |
| Population: | 29,890,000 |
| Population As Of: | 2012 |
| Catholics: | 425,000 |
| Catholics Percent: | 1.4 |
| Parishes: | 135 |
| Denomination: | Roman Catholic |
| Rite: | Latin Rite or Roman rite |
| Established: | 13 February 1940 |
| Cathedral: | St. Francis Xavier's Cathedral, Bangalore |
| Cocathedral: | St. Patrick's Church |
| Patron: | St. Francis Xavier |
| Priests: | 1632 |
| Bishop Title: | Archbishop |
| Metro Archbishop: | Peter Machado |
| Suffragan: | for one --> |
| Vicar General: | Rt. Rev. Msgr. S. Jayanathan, Rt. Rev. Msgr. C. Francis |
| Episcopal Vicar: | Rt. Rev. Msgr. Xavier Manavath, CMF |
| Archdeacon: | for one--> |
| Emeritus Bishops: | Bernard Moras (2004-2018) |
| Map: | Map of Roman Catholic Archdiocese of Bangalore.png |
| Website: | Website of the Archdiocese |
| Headquarters: | Bangalore |
| Sui Iuris Church: | Roman Church |
| Founded: | 1845 |
| Language: | KannadaTamilEnglish |
The Roman Catholic Metropolitan Archdiocese of Bangalore (Latin: Archidioecesis Bangalorensis) is an ecclesiastical territory or diocese of the Catholic Church in India. It was erected as pro-vicariate from (16 March 1845 to 2 April 1850), as Vicariate from (3 April 1850 - 31 August 1886), as Diocese of Mysore - Bangalore in the Ecclesiastical Metropolitan Province of Pondicherry in Southern India from (1 September 1886 - 12 February 1940), as Diocese of Bangalore on 13 February 1940 by Pope Pius XII, and elevated to the rank of a Metropolitan Archdiocese on 19 September 1953, with the Suffragan Dioceses of Belgaum, Bellary, Chikmagalur, Gulbarga, Karwar, Mangalore, Udupi, Mysore, and Shimoga.
The archdiocese's mother church and thus seat of its archbishop is the St. Francis Xavier's Cathedral, Bangalore; Bangalore also houses St. Mary's Basilica. Bishop Peter Machado was appointed Archbishop of Bangalore by Pope Francis on 19 March 2018.