The 2002–03 Illinois Fighting Illini men's basketball team represented University of Illinois at Urbana-Champaign in the 2002-03 NCAA Division I men's basketball season.

This was head coach Bill Self's third (and final) season at Illinois.

The 2003 squad started three freshmen, a sophomore and one senior, and still finished with a 25-7 record and second-place finish in the Big Ten.

Brian Cook earned Big Ten Player of the Year honors and the Illini won the Big Ten tournament championship for the first time.

Roster