District Head Quarters of Tamil Nadu
| Head Quarters | Pin Codes | Head Quarters | Pin Codes |
|---|---|---|---|
| Ariyalur | 621704 | Chennai | 600001 |
| Coimbatore | 641001 | Cuddalore | 607001 |
| Dharmapuri | 636701 | Dindigul | 624001 |
| Erode | 638001 | Kancheepuram | 635101 |
| Karur | 639001 | Nagercoil | 629001 |
| Madurai | 625001 | Namakkal | 637001 |
| The Nilgiris | 643001 | Nagapattinam | 611001 |
| Pudukkottai | 622001 | Perambalur | 621212 |
| Ramanathapuram | 623501 | Salem | 636001 |
| Sivaganga | 630561 | Thiruvallur | 602001 |
| Thiruvannamalai | 606601 | Tiruchirapalli | 620001 |
| Thiruvarur | 610001 | Tanjavur | 613001 |
| Tirunelvelli | 627001 | Tuticoring | 628001 |
| Theni | 625531 | Vellore | 632001 |
| Villupuram | 602602 | Virudhunagar | 626001 |