The 2017–18 Southeastern Louisiana Lions basketball team represented Southeastern Louisiana University during the 2017–18 NCAA Division I men's basketball season.

The Lions, led by fourth-year head coach Jay Ladner, played their home games at the University Center in Hammond, Louisiana as members of the Southland Conference.

They finished the season 22–12, 15–3 in Southland play to finish in a tie for the Southland regular season championship with Nicholls State.

1 seed in the Southland tournament, they defeated Sam Houston State in the semifinals before losing in the championship game to Stephen F. Austin.

They lost in the first round of the Southland tournament to Lamar.