| Jurisdiction: | Diocese |
| Palayamkottai | |
| Latin: | Dioecesis Palayamkottaiensis |
| Local: | பாளையங்கோட்டை மறைமாவட்டம் |
| Border: | catholic |
| Country: | India |
| Rite: | Latin Rite |
| Cathedral: | St. Xavier's Cathedral in Palayamkottai |
| Area Km2: | 6,102 |
| Population: | 2,652,273 |
| Population As Of: | 2004 |
| Catholics: | 123,789 |
| Catholics Percent: | 4.7 |
| Bishop: | Antonysamy Savarimuthu |
| Metro Archbishop: | Antony Pappusamy |
| Emeritus Bishops: | Jude Gerald Paulraj |
The Roman Catholic Diocese of Palayamkottai (Latin: Palayamkottaien(sis)) is a diocese located in the city of Palayamkottai in the ecclesiastical province of Madurai in India.