1988–89 Illinois State Redbirds men's basketball team

The 1988–89 Illinois State Redbirds men's basketball team represented Illinois State University during the 1988–89 NCAA Division I men's basketball season. The Redbirds, led by eleventh year head coach Bob Donewald, played their home games at both Horton Field House (finishing December, 1988) and Redbird Arena (starting January, 1989) and were a member of the Missouri Valley Conference.

The Redbirds finished the season 13–17, 6–8 in conference play to finish in a tie for fifth place. They were the number seven seed in the Missouri Valley Conference tournament. They were victorious in a quarterfinal game versus Wichita State University but were defeated in a semifinal game versus Southern Illinois University.

Schedule
!colspan=9 style=|Exhibition Season

!colspan=9 style=|Regular Season

!colspan=9 style=|Pepsi Missouri Valley Conference {MVC} tournament