| District Name | Postal Office Count |
|---|---|
| Chennai | 112 |
| Vellore | 678 |
| Tiruvannamalai | 486 |
| Kanchipuram | 481 |
| Tiruvallur | 379 |
| Villupuram | 651 |
| Cuddalore | 466 |
| Coimbatore | 613 |
| Dharmapuri | 260 |
| Salem | 501 |
| Erode | 522 |
| Karur | 241 |
| Namakkal | 384 |
| Krishnagiri | 301 |
| Nilgiris | 181 |
| Dindigul | 458 |
| Kanyakumari | 267 |
| Sivaganga | 320 |
| Ramanathapuram | 300 |
| Tuticorin | 426 |
| Tirunelveli | 555 |
| Madurai | 399 |
| Theni | 163 |
| Virudhunagar | 278 |
| Ariyalur | 222 |
| Tiruchirappalli | 485 |
| Pudukkottai | 347 |
| Tiruvarur | 348 |
| Thanjavur | 515 |
| Nagapattinam | 398 |
| Perambalur | 133 |