Tamilnadu is one of the 29 states in India and eleventh largest state. Tamilnadu is divided into 32 Districts & Capital . In this Article, we are going to explore about Tamilnadu districts, headquarters, population and top cities.
| S.No | District Name | Headquaters | Area | Population | Top Cities |
| 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 |
