Hello,
Some of the best colleges of economic honours after class 12th are:-

St. Stephen's College, Delhi University

Shri Ram College of Commerce, Delhi University

Christ University, Bangalore

Lady Shri Ram College of Commerce, Delhi University

Delhi School of Economics, Delhi University

Loyola College, Chennai

Ashoka University, Sonepat

Fergusson College, Pune

St. Joseph's College of Commerce, Bengaluru

Ethiraj College, Madras

H.R College of Commerce and Economics, Mumbai

Here is the list of good colleges for economics honours in India..
Lady Shri Ram College For Women, Delhi.
Shri Ram College Of Commerce, Delhi.
St.Xavier's College, Kolkata.
Loyola College, Chennai.
Hindu College, Delhi
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Hello Siddharth.

here is a list of some of the best colleges for economic Honors :

Loyola College, Chennai

St. Xavier's College, Mumbai

Christ University, Bangalore

Hindu College, Delhi

Madras Christian College, Chennai

Hansraj College, Delhi

Jai hind College, Mumbai

St. Xavier's College, Ahemdabad

Hope this helps!