| Jurisdiction: | Diocese |
| Kumbakonam | |
| Latin: | Dioecesis Kumbakonamensis |
| Local: | கும்பகோணம் மறைமாவட்டம் |
| Country: |  India |
| Province: | Pondicherry and Cuddalore |
| Denomination: | Catholic Church |
| Sui Iuris Church: | Latin Church |
| Rite: | Roman Rite |
| Cathedral: | St. Mary’s Cathedral in Kumbakonam |
| Area Km2: | 7,823 |
| Population: | 2,605,732 |
| Population As Of: | 2004 |
| Catholics: | 195,582 |
| Catholics Percent: | 7.5 |
| Parishes: | 88 |
| Bishop: | Jeevanandam Amalanathan |
| Metro Archbishop: | Francis Kalist |
| Emeritus Bishops: | AnthonySamy Francis |
| Vicar General: | Philomin Doss |
| Website: | Website of the Diocese |
The Diocese of Kumbakonam (la| Kumbakonamen(sis)) is a Latin Church ecclesiastical jurisdiction or diocese of the Catholic Church in India. Its episcopal see is Kumbakonam. The Diocese of Kumbakonam is a suffragan in the ecclesiastical province of the metropolitan Archdiocese of Pondicherry and Cuddalore.