Tamil Nadu is the state in southeastern India, every district has its own administrative system and Deputy commissioners to control and handle development. Tamilnadu state consists of 32 districts, including two newly divided districts ‘Ariyalur’ and ‘Tirupur’. The following list of 32 districts, details including Talukas (Sub-division of District).
| Sl.No | District | Headquarters | Area (km²) | Population (2011) | Taluks (Sub-Division) |
|---|---|---|---|---|---|
| 1 | Viluppuram | Viluppuram | 7,185 | 3,463,284 | Kallakurichi, Sankarapuram, Ulundurpettai, Tirukoilur, Gingee, Vanur taluk, Villupuram, Tindivanam |
| 2 | Tirunelveli | Tirunelveli | 6,709 | 3,072,880 | Alangulam, Ambasamudram, Nanguneri, Palayamkottai, Tenkasi, Shenkottai, Radhapuram, Sankarankoil, Sivagiri, Tirunelveli, Veerakeralamputhur |
| 3 | Tiruvannamalai | Tiruvannamalai | 6,188 | 3,468,965 | Thiruvannamalai, kizh-Pennathur, kalasapakkam, Javadi Hills, polur, Chengam, Thandarampattu, Arani, Vandavasi, Cheyyar. |
| 4 | Vellore | Vellore | 6,081 | 3,928,106 | Pallikonda, Arcot, Ambur, Vaniyambadi, Tiruppattur, Walajapet, Katpadi, Thiruvalam, Gudiyatham. |
| 5 | Dindigul | Dindigul | 6,054 | 2,161,367 | Dindigul, Kodaikanal, Natham taluk, Athoor taluk, Nilakottai taluk, Oddanchathiram taluk, Palani taluk, Vedasandhur taluk, Kodaikanal taluk.[2] |
| 6 | Erode | Erode | 5,692 | 2,259,608 | Bhavani taluk, Erode taluk, Gobichettipalayam taluk, Perundurai taluk, Sathyamangalam |
| 7 | Salem | Salem | 5,249 | 3,480,008 | Attur, Edappadi, Gangavalli, Mettur, Omalur, Salem, Sankagiri, Valapady, Yercaud |
| 8 | Tirupur | Tirupur | 5,192 | 2,471,222 | Tiruppur, Avinashi, Palladam, Dharapuram, Kangayam, Udumalaipet, Madathukulam |
| 9 | Krishnagiri | Krishnagiri | 5,091 | 1,883,731 | Krishnagiri, Hosur, Pochampalli, Uthangarai, Denkanikottai |
| 10 | Pudukkottai | Pudukkottai | 4,652 | 1,618,725 | Pudukkottai, Gandarvakottai, Ilupur, Kulatur, Tirumayam, Alangudi, Arangthangi, Avudaiyarkoil, Manamelkudi |
| 11 | Coimbatore | Coimbatore | 4,642 | 3,472,578 | Mettupalayam, Coimbatore-North, Coimbatore-South, Sulur, Pollachi, Valparai.[1] |
| 12 | Thoothukudi | Thoothukudi | 4,599 | 1,738,376 | Tuticorin, Thiruchendur, Sathankulam, Srivaikundam, Ottapidaram, Kovilpatti, Ettayapuram, Vilathikulam |
| 13 | Dharmapuri | Dharmapuri | 4,527 | 1,502,900 | Dharmapuri, Palacode, Pennagaram, Harur and Pappireddipatti |
| 14 | Tiruchirappalli | Tiruchirappalli | 4,508 | 2,713,858 | Manapparai, Srirangam, Tiruchirapalli, Lalgudi, Manachanallu, Thuraiyur, Musiri, Thottiyam |
| 15 | Kanchipuram | Kanchipuram | 4,305 | 3,990,897 | Chengalpattu, Cheyyur, Tambaram, Madurantakam, Sriperumbudur, Kanchipuram, Thirukazhukundram, Uthiramerur |
| 16 | Virudhunagar | Virudhunagar | 4,280 | 1,943,309 | Aruppukkottai, Kariapatti, Rajapalayam, Sattur taluk, Sivakasi, Srivilliputhur, Tiruchuli, Virudhunagar |
| 17 | Ramanathapuram | Ramanathapuram | 4,180 | 1,337,560 | Ramanathapuram, Tiruvadanai, Rameswaram, Paramakudi, Mudukulathur, Kamuthi, Kadaladi |
| 18 | Sivaganga | Sivaganga | 4,140 | 1,341,250 | |
| 19 | Cuddalore | Cuddalore | 3,705 | 2,600,880 | Cuddalore, Panruti, Chidambaram, Kattumannarkoil, Vriddachalam, Titakudi,neyveli,nellikupam |
| 20 | Madurai | Madurai | 3,695 | 3,041,038 | Madurai North, Madurai South, Melur, Tirumangalam, Periyur, Usilampatti, Vadipatti |
| 21 | Tiruvallur | Tiruvallur | 3,552 | 3,725,697 | Ambattur, Gummidipoondi, Pallipattu, Ponneri, Poonamallee, Tiruvallur, Uthukkottai |
| 22 | Thanjavur | Thanjavur | 3,477 | 2,402,781 | Kumbakonam, Orathanadu, Papanasam, Pattukkottai, Peravurani, Thanjavur, Thiruvaiyaru, Thiruvidaimarudur[3] |
| 23 | Namakkal | Namakkal | 3,402 | 1,721,179 | Namakkal, Velur, Tiruchengode, Rasipuram |
| 24 | Karur | Karur | 2,902 | 1,076,588 | Aravakurichi, Karur, Krishnarayapuram, Kulithalai |
| 25 | Theni | Theni | 2,872 | 1,243,684 | Theni, Periyakulam, Andipatti, Bodinayakkanur, Uthamapalayam |
| 26 | Nilgiris | Udagamandalam | 2,552 | 735,071 | |
| 27 | Nagapattinam | Nagapattinam | 2,416 | 1,614,069 | Kilvelur, Kuthalam, Mayiladuthurai, Nagapattinam, Sirkazhi, Tharangambadi, Thirukkuvalai, Vedaranyam |
| 28 | Tiruvarur | Tiruvarur | 2,379 | 1,268,094 | Kudavasal, Mannargudi, Nannilam, Needamangalam, Thiruthiraipoondi, Tiruvarur, Valangaiman |
| 29 | Ariyalur | Ariyalur | 1,944 | 752,481 | Ariyalur, Udayarpalayam, Sendurai |
| 30 | Perambalur | Perambalur | 1,748 | 564,511 | |
| 31 | Kanyakumari | Nagercoil | 1,685 | 1,863,174 | Agastheeswaram, Kalkovil, Vilavancode, Thovalai |
| 32 | Chennai | Chennai | 174 | 4,681,087 | Egmore-Nungambakkam taluk, Mylapore-Triplicane taluk, Mambalam-Guindy taluk, Fort-Tondiarpet taluk, Perambur-Purasawalkam taluk |
