UCO Bank is in Follwing Districts in Tamil Nadu State

Chengalpattu
Chennai
Coimbatore
Cuddalore
Dharmapuri
Dindigul
Erode
Kancheepuram
Karur
Krishnagiri
Madurai
Mundiyampakkom
Nagapattinam
Nagercoil
Nallipalayam
Namagiripettai
Nilgiris
Ootacamund
Oraiyur - Tn
Perambalur
Pudukkottai
Ramanathapuram
Ranipet
Salem
Sivaganga
Sivagangai
Sivakasi
Tenkasi
Thanjavur
Theni
Thiruvallur
Tiruchirapalli
Tirunelvali
Tirunelveli
Tirupur
Tiruvannamalai
Toothukudi
Tuticorin
Vellore
Virudhunagar