The 2018–19 Indiana State Sycamores basketball team represented Indiana State University during the 2018–19 NCAA Division I men's basketball season. The Sycamores, led by ninth-year head coach Greg Lansing, played their home games at the Hulman Center in Terre Haute, Indiana as members of the Missouri Valley Conference. They finished the season 15–16, 7–11 in MVC play to finish in a tie for eighth place. As the No. 8 seed in the MVC tournament, they lost to Valparaiso in the first round.