The 2019–20 Southeastern Louisiana Lions basketball team represented Southeastern Louisiana University during the 2019–20 NCAA Division I men's basketball season. The Lions were led by first-year head coach David Kiefer, and played their home games at the University Center in Hammond, Louisiana as members of the Southland Conference. They finished the season 8–23, 5–15 in Southland play to finish in a tie for 11th place. They failed to qualify for the Southland Conference tournament.