I. Dioceses of Latin Rite
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Archdiocese of Madras-Mylapore
Address: Archbishop’s House, 41, Santhome High Road, Chennai – 600 004
2. Archdiocese of Madurai
Address: Archbishop’s House, Near Govt. I.T.I., K. Pudur, Madurai – 625 007
3. Archdiocese of Cuddalore- Pondicherry
Address: Archbishop’s House, Cathedral Street, Post Box No. 193, Puducherry – 605 001
4. Diocese of Dindigul
Address: Bishop’s House,Valan Nagar, Post Box No. 6, Mullipadi P.O., B.K. Pudur S.O., Dindigul – 624 005
5. Diocese of Thanjavaur
Address: Bishop’s House, Post Box No. 204, Thanjavur – 613 007
6. Diocese of Dharmapuri
Address: Bishop’s House, P. B. No. 32, Nethaji By-Pass Road, Dharmapuri – 636 701
7. Diocese of Palayamkottai
Address: Catholic Bishop’s House, Post Box No. 108, Palayamkottai – 627 002
8. Diocese of Kottar
Address: Catholic Bishop’s House, Post Box No. 17, Asaripallam Road, Nagercoil – 629 001
9. Diocese of Thiruchirapalli
Address: Bishop’s House, Post Box No.14, 12/A, Convent Road, Melapudur, Thiruchirapalli – 620 001
10. Diocese of Chengleput
Address: Bishop’s House, CRDS Campus, Thimmavaram, Chengleput – 603 101
11. Diocese of Kumbakonam
Address: Bishop’s House, Post Box No. 3, Kumbakonam – 612 001
12. Diocese of Salem
Address: Bishop’s House, Post Box No. 703, 2, Court Road, Maravaneri, Salem – 636 007
13. Diocese of Coimbatore
Address: Bishop’s House, Post Box No. 6, Big Bazaar Street, Coimbatore – 641 001
14. Diocese of Ooty
Address: Bishop’s House, Post Box No. 5, Ootacamund – 643 001
15. Diocese of Tuticorin
Address: Catholic Bishop’s House, G.C. Road, Cathedral P.O., Tuticorin – 628 001
16. Diocese of Sivagangai
Address: Bishop’s House, Britto Nagar, Melur Road, Sivagangai – 630 561
17. Diocese of Vellore
Address: Bishop’s House, 34, Officers Line, Vellore – 632 001
18. Diocese of Kuzhithurai
Address: Bishop’s House, P.B. No.1, Unnamalaikadai, Kanyakumari – 629 179
II. Dioceses of Syro-Malabar Rite
19.Diocese of Thuckalay
Address: Bishop’s House, Post Box No. 12, Thuckalay – 629 175, Kanyakumari Dt.
20. Diocese of Ramanathapuram
Address: Syrian Bishop’s House, Holy Trinity Church,Trichy Road, Ramanathapuram, Coimbatore – 641 045
Dioceses of Syro-Malankara Rite
21. Diocese of Marthandom
Address: Bishop’s House, Marthandom – 629 165, Kanyakumari Dt.