Indian Overseas Bank is in Follwing Districts in Chhattisgarh State

Bastar
Bhilai
Bilaspur
Dhamtari
Durg
Janjgir - Champa
Janjgirchampa
Jashpur Nagar
Kawardha
Korba
Koriya
Mahasamund
Raigarh
Raipur
Rajnandgaon
Surguja