Hey, glad to know that you are interested in pursuing Economic (hons.). Its a very interesting course and some of the best colleges for it are -

1. Lady Shri Ram College for Women (Delhi University)

2. St. Stephen's College (Delhi University)

3. Hansraj College (Delhi University) 

4. Christ University (Bangalore)

5. Jai Hind college (Mumbai) 

I can give you more options, if you could let me know the level of your study (undergraduate or graduate).

Good Luck :)