The 2019–20 LIU Sharks men's basketball team represented Long Island University during the 2019–20 NCAA Division I men's basketball season. The Sharks were led by third-year head coach Derek Kellogg, and played their home games at the Steinberg Wellness Center, with some home games at the Barclays Center, as members of the Northeast Conference (NEC). This was the first season for the LIU Sharks, which is a consolidation of the two athletic programs, the Division I LIU Brooklyn Blackbirds and Division II LIU Post Pioneers.