| No. | Name of District | Area (sq km) | Population | Name of Head Quarters |
|---|---|---|---|---|
| 1 | Ariyalur | 1,949.31 | 754,894 | Ariyalur |
| 2 | Chennai | 175 | 4,646,732 | Chennai |
| 3 | Coimbatore | 4,723 | 3,458,045 | Coimbatore |
| 4 | Cuddalore | 3,678 | 2,605,914 | Cuddalore |
| 5 | Dharmapuri | 4,497.77 | 1,506,843 | Dharmapuri |
| 6 | Dindigul | 6,266.64 | 2,159,775 | Dindigul |
| 7 | Erode | 4,723 | 2,251,744 | Erode |
| 8 | Kallakurichi | 11.69 | 1,57,628 | Kallakurichi |
| 9 | Kanchipuram | 4,393 | 3,998,252 | Kanchipuram |
| 10 | Kanniyakumari | 1,672 | 1,870,374 | Nagercoil |
| 11 | Karur | 2,895.57 | 1,064,493 | Karur |
| 12 | Krishnagiri | 5,143 | 1,879,809 | Krishnagiri |
| 13 | Madurai | 3,741.73 | 3,038,252 | Madurai |
| 14 | Nagapattinam | 2,715.83 | 1,616,450 | Nagapattinam |
| 15 | Namakkal | 3,363 | 1,726,601 | Namakkal |
| 16 | Nilgiris | 2,452.5 | 735,394 | Ooty |
| 17 | Perambalur | 1,757 | 565,223 | Perambalur |
| 18 | Pudukkottai | 4,663 | 1,618,345 | Pudukkottai |
| 19 | Ramanathapuram | 4,089.57 | 1,353,445 | Ramanathapuram |
| 20 | Salem | 5,205 | 3,482,056 | Salem |
| 21 | Sivaganga | 4,086 | 1,339,101 | Sivaganga |
| 22 | Thanjavur | 3,396.57 | 2,405,890 | Thanjavur |
| 23 | Theni | 3,066 | 1,245,899 | Theni |
| 24 | Thoothukudi | 4,621 | 1,750,176 | Thoothukudi |
| 25 | Tiruchirappalli | 4,407 | 2,722,290 | Tiruchirappalli |
| 26 | Tirunelveli | 6,810 | 3,077,233 | Tirunelveli |
| 27 | Tiruppur | 5,186.34 | 2,479,052 | Tiruppur |
| 28 | Tiruvallur | 3,424 | 3,728,104 | Tiruvallur |
| 29 | Tiruvannamalai | 6,191 | 2,464,875 | Tiruvannamalai |
| 30 | Tiruvarur | 2,161 | 1,264,277 | Tiruvarur |
| 31 | Vellore | 6,077 | 3,936,331 | Vellore |
| 32 | Viluppuram | 7,217 | 3,458,873 | Viluppuram |
| 33 | Virudhunagar | 4,288 | 2,105,930 | Virudhunagar |
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