Illinois is the fifth-most populous state of the United States of America, and is often said to be a mini representation of the entire United States.
Illinois (IL) is ranked #5 among all American states in terms of the number of foreign students studying in its universities & colleges. As of 2015, there were 46,574 international students studying in Illinois out of which 18.8 % were Indian students.
As an Indian student, if you plan to study there, here is some information that might be useful for you.
University of Chicago