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 defeated UT Martin in the quarterfinals of the OVC tournament before losing in the semifinals to Murray State.

They defeated Tennessee Tech in the quarterfinals of the OVC tournament before losing in the semifinals to Murray State.

They were invited to the College Basketball Invitational where they defeated Canisius and Central Arkansas to advance to the semifinals where they lost to North Texas.