The 2018–19 LIU Brooklyn Blackbirds men's basketball team represented LIU Brooklyn during the 2018–19 NCAA Division I men's basketball season. The Blackbirds were led by second-year head coach Derek Kellogg, and played their home games at the Steinberg Wellness Center, with two home games at the Barclays Center, as members of the Northeast Conference (NEC). They finished the season 16–16 overall, 9–9 in NEC play to finish in a tie for fifth place. As the No. 6 seed in the NEC tournament, they advanced to the semifinals, where they were defeated by Saint Francis (PA).