Tamil Nadu is divided in to four major divisions as per the ancient Tamil kings namely Pallava Nadu division, Chera Nadu division, Chola Nadu division and Pandya Nadu division and the four divisions are further subdivided into 37 districts, which are listed below. List of 4 Divisions and Districts North (Tondai West (Kongu Central (Chola South (Pandya Nadu) Nadu) Nadu) Nadu) 1. Chengalpattu 12. Coimbatore 22. Ariyalur 29. Kanyakumari 2. Chennai 13. Dharmapuri 23. Nagapattinam 30. Madurai 3. Cuddalore 14. Dindigul 24. Perambalur 31. Ramanathapuram 4. Kallakurichi 15. Erode 25. Pudukkottai 32. Sivagangai 5. Kancheepuram 16. Karur 26. Thanjavur 33. Tenkasi 6. Ranipet 17. Krishnagiri 27. Tiruchirappalli 34. Theni 7. Tirupattur 18. Namakkal 28. Tiruvarur 35. Thoothukudi 8. Tiruvallur 19. Nilgiris 36. Tirunelveli 9. Tiruvannamalai 20. Salem 37. Virudhunagar 10. Vellore 21. Tirupur 11. Villuppuram List of Districts No Code District Headquarte Area(km Populatio Website rs 2) n 1 AR Ariyalur Ariyalur 1,944 752,481 https://ariyalur.nic.in/ CG 2 Chengalpattu Chengalpattu 2,945 2,556,423 CH 3 Chennai Chennai 174 4,681,087 https://chennai.nic.in/ CO 4 Coimbatore Coimbatore 4,642 3,172,578 https://coimbatore.nic.in CU 5 Cuddalore Cuddalore 3,705 2,600,880 https://cuddalore.nic.in DH 6 Dharmapuri Dharmapuri 4,527 1,502,900 https://dharmapuri.nic.in/ DI 7 Dindigul Dindigul 6,054 2,161,367 https://dindigul.nic.in/ ER 8 Erode Erode 5,692 2,259,608 https://erode.nic.in/ KL 9 Kallakurichi Kallakurichi 2,174 548,950 KK 10 Kanyakumari Nagercoil 1,685 1,863,174 https://kanniyakumari.nic.in / KC 11 Kanchipuram Kanchipuram 4,305 2,690,897 https://kancheepuram.nic.in / KR 12 Karur Karur 2,902 1,076,588 https://karur.nic.in/ KR 13 Krishnagiri Krishnagiri 5,091 1,883,731 https://krishnagiri.nic.in/ MA 14 Madurai Madurai 3,695 2,441,038 https://madurai.nic.in/ NG 15 Nagapattinam Nagapattinam 2,416 1,614,069 https://www.nagapattinam. nic.in/ NM 16 Namakkal Namakkal 3,402 1,721,179 https://namakkal.nic.in/ NI 17 Nilgiris Udagamandal 2,552 735,071 https://nilgiris.nic.in/ am PE 18 Perambalur Perambalur 1,748 564,511 https://perambalur.nic.in/ PU 19 Pudukkottai Pudukkottai 4,652 1,618,725 https://pudukkottai.nic.in/ RA 20 Ramanathapu Ramanathapu 4,180 1,337,560 https://ramanathapuram.ni ram ram c.in/ RN 21 Ranipet Ranipet 2,234 1,210,277 SA 22 Salem Salem 5,249 3,480,008 https://salem.nic.in/ SI 23 Sivaganga Sivaganga 4,140 1,341,250 https://sivaganga.nic.in/ TS 24 Tenkasi Tenkasi 2916.13 1,407,627 TJ 25 Thanjavur Thanjavur 3,477 2,302,781 https://thanjavur.nic.in/ TH 26 Theni Theni 2,872 1,143,684 https://theni.nic.in/ TK 27 Thoothukudi Thoothukudi 4,599 1,738,376 https://thoothukudi.nic.in/ TC 28 Tiruchirappalli Tiruchirappalli 4,508 2,713,858 https://tiruchirappalli.nic.in/ TI 29 Tirunelveli Tirunelveli 6,709 3,072,880 https://tirunelveli.nic.in/ TU 30 Tirupathur Tirupathur 1,797 1,111,812 TP 31 Tirupur Tirupur 5,192 2,471,222 https://tiruppur.nic.in/ TL 32 Tiruvallur Tiruvallur 3,552 3,725,697 https://tiruvallur.nic.in/ TV 33 Tiruvannamal Tiruvannamal 6,188 4,121,965 https://tiruvannamalai.nic.i ai ai n/ TR 34 Tiruvarur Tiruvarur 2,379 1,268,094 https://tiruvarur.nic.in/ VE 35 Vellore Vellore 6,081 4,028,106 https://vellore.nic.in/ VL 36 Viluppuram Viluppuram 5,080 295,687 https://viluppuram.nic.in/ VR 37 Virudhunagar Virudhunagar 4,280 1,943,309 https://virudhunagar.nic.in/ .