Tamil Nadu districts

North Tamil Nadu

Chennai
Vellore
Chengalpattu
Kanchipuram
Tiruvallur
Cuddalore
Villupuram
Kallakurichi
Tiruvannamalai
Ranipet
Tirupathur

West Tamil Nadu

Coimbatore
Salem
Erode
Tiruppur
Namakkal
Krishnagiri
Dharmapuri
Nilgiris

South Tamil Nadu

Madurai
Tirunelveli
Thoothukudi
Dindigul
Kanyakumari
Theni
Virudhunagar
Sivaganga
Ramanathapuram
Tenkasi

Central Tamil Nadu

Trichy
Karur
Pudukkottai
Perambalur
Ariyalur

Delta Tamil Nadu

Thanjavur
Tiruvarur
Nagapattinam
Mayiladuthurai