| S.No | District Name | Total No. of Pincode |
|---|---|---|
| 1 | Thiruvallur | 22 |
| 2 | Chennai | 54 |
| 3 | Kancheepuram | 15 |
| 4 | Vellore | 110 |
| 5 | Dharmapuri | 24 |
| 6 | Tiruvannamalai | 62 |
| 7 | Viluppuram | 79 |
| 8 | Salem | 84 |
| 9 | Namakkal | 54 |
| 10 | Erode | 79 |
| 11 | The Nilgiris | 1 |
| 12 | Coimbatore | 136 |
| 13 | Dindigul | 56 |
| 14 | Karur | 32 |
| 15 | Tiruchirappalli | 84 |
| 16 | Perambalur | 22 |
| 17 | Ariyalur | 27 |
| 18 | Cuddalore | 61 |
| 19 | Nagapattinam | 81 |
| 20 | Thiruvarur | 16 |
| 21 | Thanjavur | 89 |
| 22 | Pudukkottai | 50 |
| 23 | Sivaganga | 63 |
| 24 | Madurai | 57 |
| 25 | Theni | 31 |
| 26 | Virudhunagar | 56 |
| 27 | Ramanathapuram | 58 |
| 28 | Thoothukkudi | 87 |
| 29 | Tirunelveli | 117 |
| 30 | Kanniyakumari | 65 |
| 31 | Kanchipuram | 83 |
| 32 | Krishnagiri | 34 |
| 33 | Tiruvarur | 53 |
| 34 | Tiruvallur | 36 |
| 35 | Thoothukudi | 2 |
| 36 | Nilgiris | 45 |