hii Gaurav 

although there a huge no of college offering diploma in banking, finance and diploma but i can help you out with the list of some of the best colleges offering this course.

•   IFIM Business school, Banglore 
• SP Jain institute of management and research, Mumbai
• BIMTECH - Birla Institute of Science and Technology
• Institute of Insurance and risk management,Hyderabad
• SVIMS - Sir M Visvesvaraya Institute of Management Studies and Research

I am also providing you the link through which you can also find out several other colleges apart for this course

https://bschool.careers360.com/colleges/list-of-banking-and-finance-colleges-in-india

Thank you

Hello Aspirant,  there are lot of colleges for the diploma in Banking finance and in Insurance. I am giving you number of colleges that are good. 

1. TKWs Institute of Banking and Finance

2. SVIMS - Sir M Visvesvaraya Institute of Management Studies and Research. 

I hope this will help you still if any doubt then free to comment.