Tamil Nadu Districts RTA Codes - Vehicle Registration Codes
| TN-01 | Chennai Central (Ayanavaram) |
| TN-02 | Chennai West (Anna Nagar) |
| TN-03 | Chennai North East (Tondiarpet) |
| TN-04 | Chennai East (Basin Bridge) |
| TN-05 | Chennai North (Vyasarpadi) |
| TN-06 | Chennai South East (Mandaveli) |
| TN-07 | Chennai South (Thiruvanmiyur) |
| TN-09 | Chennai West (K.K. Nagar) |
| TN-10 | Chennai South West (Valasarawakkam) |
| TN-11 | Tambaram |
| TN-12 | Poonamalee |
| TN-13 | Ambattur |
| TN-14 | Sholinganallur |
| TN-15 | Ulundurpet
TN-15Z Kallakurichi |
| TN-16 | Tindivanam
TN-16Z Gingee |
| TN-18 | Sengundram(Red Hills)
TN-18Y Gummidipoondi |
| TN-19 | Chengalpattu
TN-19Z Madurantakam |
| TN-20 | Tiruvallur
TN-20X Thiruthani |
| TN-21 | Kanchipuram
TN-21W Sriperumbudur |
| TN-22 | Meenambakkam |
| TN-23 | Vellore
TN-23T Gudiyatham |
| TN-24 | Krishnagiri |
| TN-25 | Thiruvannamalai
TN-25Y Cheyyar TN-25Z Arani |
| TN-28 | Namakkal
TN-28Z Rasipuram |
| TN-29 | Dharmapuri
TN-29W Palacode TN-29Z Harur |
| TN-30 | Salem (West)
TN-30W Omalur |
| TN-31 | Cuddalore
TN-31Z Panruti |
| TN-32 | Villupuram |
| TN-33 | Erode East |
| TN-34 | Thiruchengode |
| TN-36 | Gobichettipalayam
TN-36W Bhavani TN-36Z Sathyamangalam |
| TN-37 | Coimbatore (South)
TN-37Z Sulur |
| TN-38 | Coimbatore (North) |
| TN-39 | Tirupur (North)
TN-39Z Avinashi |
| TN-40 | Mettupalayam |
| TN-41 | Pollachi
TN-41W Valparai |
| TN-42 | Tirupur (South)
TN-42Y Kangayam |
| TN-43 | Uthagamandalam
TN-43Z Gudalur |
| TN-45 | Tiruchirapalli
TN-45Z Manapparai |
| TN-46 | Perambalur |
| TN-47 | Karur
TN-47X Manmangalam TN-47Y Avarakurichi TN-47Z Kulithalai |
| TN-48 | Srirangam (Tiruchirapalli)
TN-48X Lalgudi TN-48Y Musiri TN-48Z Thuraiyur |
| TN-49 | Thanjavur
TN-49Y Pattukottai |
| TN-50 | Tiruvarur
TN-50Y Thiruthuraipoondi TN-50Z Mannargudi |
| TN-51 | Nagapattinam |
| TN-52 | Sankagiri
TN-52Z Mettur |
| TN-54 | Salem (East) |
| TN-55 | Pudukottai
TN-55Y Illupur TN-55Z Aranthangi |
| TN-56 | Perundurai |
| TN-57 | Dindigul
TN-57V Vedasandur TN-57Y Bathlagundu TN-57Z Palani |
| TN-58 | Madurai (South)
TN-58Y Usilampatti TN-58Z Thirumangalam |
| TN-59 | Madurai (North)
TN-59V Vadipatti TN-59Z Melur |
| TN-60 | Theni |
| TN-61 | Ariyalur |
| TN-63 | Sivagangai
TN-63Z Karaikkudi |
| TN-64 | Madurai (Central) |
| TN-65 | Ramanathapuram
TN-65Z Pramakudi |
| TN-66 | Coimbatore (Central) |
| TN-67 | Virudhunagar
TN-67W Aruppukottai |
| TN-68 | Kumbakonam |
| TN-69 | Tuticorin
TN-69Z Kovilpatti |
| TN-70 | Hosur |
| TN-72 | Tirunelveli
TN-72V Valliyur |
| TN-73 | Ranipet
TN-73Z Arakkonam |
| TN-74 | Nagercoil |
| TN-75 | Marthandam |
| TN-76 | Tenkasi
TN-76V Ambasamudram |
| TN-77 | Attur
TN-77Z Valapadi |
| TN-78 | Dharapuram
TN-78Z Udumalpet |
| TN-79 | Sankarankovil |
| TN-81 | Tiruchirapalli East / Thiruverumbur |
| TN-82 | Mayiladuthurai
TN-82Z Sirkazhi |
| TN-83 | Vaniyambadi
TN-83Y Ambur TN-83Z Tirupattur |
| TN-84 | Srivilliputhur
TN-84Z Sivakasi |
| TN-85 | Kundrathur/Manapakkam |
| TN-86 | Erode West |
| TN-87 | Sriperumbudur |
| TN-88 | Namakkal South
TN-88Z Paramathi Velur |
| TN-90 | Salem South |
| TN-91 | Chidambaram
TN-91Y Neyveli TN-91Z Virudhachalam |
| TN-92 | Tiruchendur |
| TN-93 | Mettur |
| TN-94 | Palani
TN-94Z Oddanchatram |
| TN-95 | Sivakasi |
| TN-96 | Kovilpatti |
| TN-99 | Coimbatore West |