Vicariates
| # | Vicariates | No of Parish |
|---|---|---|
| 1 | Thanjavur | 21 |
| 2 | Pattukottai | 17 |
| 3 | Pudukottai | 16 |
| 4 | Avudaiyarkoil | 8 |
| 5 | Mayiladuthurai | 11 |
| 6 | Nagapattinam | 15 |
| 7 | Palayamkottai | 8 |
| # | Vicariates | No of Parish |
|---|---|---|
| 1 | Thanjavur | 21 |
| 2 | Pattukottai | 17 |
| 3 | Pudukottai | 16 |
| 4 | Avudaiyarkoil | 8 |
| 5 | Mayiladuthurai | 11 |
| 6 | Nagapattinam | 15 |
| 7 | Palayamkottai | 8 |