PIN codes of Tamil Nadu by district
| District | PIN codes | Post offices | Head post office |
|---|---|---|---|
| Ariyalur | 31 (608703 to 621851) | 221 | – |
| Chengalpattu | 60 (600043 to 603406) | 281 | Tambaram 600045, Chengalpattu 603001 |
| Chennai | 83 (600001 to 600125) | 156 | Chennai 600001, Anna Road 600002, Park Town 600003, Mylapore 600004, St Thomas Mount 600016, Thygarayanagar 600017, Ambattur 600053 |
| Coimbatore | 107 (638459 to 642205) | 416 | Coimbatore 641001, Rathinasabapathy Puram 641002, Mettupalayam 641301, Pollachi 642001 |
| Cuddalore | 68 (605007 to 608801) | 474 | Vriddhachalam 606001, Cuddalore 607001, Chidambaram 608001 |
| Dharmapuri | 33 (635106 to 636906) | 260 | Dharmapuri 636701 |
| Dindigul | 58 (624001 to 642113) | 459 | Dindigul 624001, Nilakottai 624208, Palani 624601 |
| Erode | 61 (638001 to 641302) | 348 | Erode 638001, Bhavani 638301, Gobichettipalayam 638452 |
| Kallakurichi | 32 (605702 to 607209) | 250 | Tirukkoyilur 605757, Kallakurichi 606202 |
| Kanchipuram | 31 (600069 to 631606) | 157 | Kanchipuram 631501 |
| Kanniyakumari | 65 (629001 to 629901) | 267 | Nagercoil 629001, Thuckalay 629175 |
| Karur | 36 (621301 to 639207) | 242 | Karur 639001, Kulittalai 639104 |
| Krishnagiri | 38 (635001 to 636902) | 299 | Krishnagiri 635001 |
| Madurai | 57 (625001 to 625708) | 393 | Madurai 625001, Tallakulam 625002, Arasaradi 625016 |
| Mayiladuthurai | 51 (609001 to 612203) | 214 | Mayiladuthurai 609001, Sirkali 609110 |
| Nagapattinam | 39 (608002 to 614810) | 174 | Nagapattinam 611001 |
| Namakkal | 60 (621215 to 638183) | 360 | Namakkal 637001, Tiruchengodu 637211 |
| Perambalur | 24 (621101 to 621717) | 140 | Perambalur 621212 |
| Pudukkottai | 53 (613301 to 622515) | 343 | Pudukkottai 622001 |
| Ramanathapuram | 58 (623115 to 623806) | 306 | Ramanathapuram 623501, Paramakudi 623707 |
| Ranipet | 40 (604407 to 632531) | 210 | Arakkonam 631001, Ranipet 632401 |
| Salem | 90 (621011 to 638183) | 511 | Salem 636001, Suramangalam 636005, Atur 636102 |
| Sivaganga | 66 (621308 to 630713) | 315 | Karaikudi 630001, Devakottai 630302, Sivaganga 630561, Manamadurai 630606 |
| Tenkasi | 50 (626140 to 628552) | 241 | Sankarankovil 627756, Tenkasi 627811 |
| Thanjavur | 101 (609204 to 614906) | 516 | Kumbakonam 612001, Melakaveri 612002, Thanjavur 613001, Papanasam 614205, Pattukottai 614601 |
| The Nilgiris | 47 (638451 to 643270) | 182 | Udagamandalam 643001, Coonoor 643101 |
| Theni | 31 (625203 to 625605) | 161 | Bodinayakanur 625513, Periyakulam 625601 |
| Thiruvallur | 60 (600019 to 631402) | 349 | Avadi Camp 600054, Tiruvallur 602001 |
| Thiruvarur | 73 (609403 to 614903) | 358 | Tiruvarur 610001, Mannargudi 614001, Tiruturaipundi 614713 |
| Tiruchirappalli | 90 (620001 to 639115) | 487 | Tiruchirappalli 620001, Srirangam 620006, Turaiyur 621010, Lalgudi 621601 |
| Tirunelveli | 78 (626123 to 628552) | 307 | Tirunelveli 627001, Palayankottai 627002, Ambasamudram 627401 |
| Tirupathur | 27 (635601 to 635901) | 193 | Tirupattur 635601 |
| Tiruppur | 65 (638051 to 642207) | 358 | Dharapuram 638656, Tirupur 641601, Udamalpet 642126 |
| Tiruvannamalai | 70 (604401 to 635703) | 495 | Tiruvannamalai 606601, Arni 632301 |
| Tuticorin | 91 (626202 to 628952) | 427 | Tuticorin 628001, Tiruchendur 628215, Kovilpatti 628501, Srivaikuntam 628601 |
| Vellore | 51 (632001 to 635813) | 253 | Vellore 632001, Gudiyattam 632602 |
| Villupuram | 59 (604001 to 607209) | 392 | Tindivanam 604001, Villupuram 605602 |
| Virudhunagar | 60 (626001 to 630611) | 280 | Virudhunagar 626001, Aruppukottai 626101, Rajapalayam 626117, Sivakasi 626123 |
Head post offices in Tamil Nadu
Head post offices sort and dispatch the mail of the sub and branch offices around them. Their PIN codes are often the ones people mean by “the PIN code of” a city: Tambaram 600045, Chengalpattu 603001, Chennai 600001, Anna Road 600002, Park Town 600003, Mylapore 600004, St Thomas Mount 600016, Thygarayanagar 600017, Ambattur 600053, Coimbatore 641001, Rathinasabapathy Puram 641002, Mettupalayam 641301, Pollachi 642001, Vriddhachalam 606001, Cuddalore 607001, Chidambaram 608001, Dharmapuri 636701, Dindigul 624001, Nilakottai 624208, Palani 624601, Erode 638001, Bhavani 638301, Gobichettipalayam 638452, Tirukkoyilur 605757, Kallakurichi 606202, Kanchipuram 631501, Nagercoil 629001, Thuckalay 629175, Karur 639001, Kulittalai 639104 and more in the district pages.