Hello aspirant! 
I'm gonna list top 15 colleges for BA economics honours in Delhi. Almost all of these are under University of Delhi since it is one the finest in India. 
1) Delhi school of economics
2) Hindu College
3) Shri Ram College of Commerce (SRCC)
4) Hansraj College
5) Shaheed Bhagat Singh College 
6) Sri Venkateswara College
7) Kirori Mal College
8) Ramjas College
9) Lady Shri Ram College 
10) Delhi College of Arts and Commerce
11) Delhi Technological University
12) Guru Gobind Singh Indraprastha University (GGSIPU)
13) Jesus and Mary College
14) Gargi College
15) Miranda House
Hope this helps