The 2018–19 Jacksonville State Gamecocks men's basketball team represented Jacksonville State University during the 2018–19 NCAA Division I men's basketball season. The Gamecocks, led by third-year head coach Ray Harper, played their home games at the Pete Mathews Coliseum in Jacksonville, Alabama as members of the Ohio Valley Conference. They finished the season 24–9, 15–3 in OVC play to finish in third place. They defeated UT Martin in the quarterfinals of the OVC tournament before losing in the semifinals to Murray State. Despite having 24 wins, they did not participate in a postseason tournament.