The 2018–19 Illinois State Redbirds men's basketball team represented Illinois State University during the 2018–19 NCAA Division I men's basketball season. The Redbirds, led by seventh-year head coach Dan Muller, played their home games at Redbird Arena in Normal, Illinois as a member of the Missouri Valley Conference. They finished the season 17–16, 9–9 in conference play, to finish in a tie for the fifth place. As the number seven seed in the MVC tournament, they defeated Evansville in the opening round and were beaten by Drake in the quarterfinal round.