The 2018–19 Stony Brook Seawolves men's basketball team represented Stony Brook University in the 2018–19 NCAA Division I men's basketball season. They played their home games at the Island Federal Credit Union Arena in Stony Brook, New York and were led by third-year head coach Jeff Boals. The team won 24 regular season games, a school record as a Division I program, including a nation-leading 13 road wins and received the No. 2 seed in the America East tournament. However, they lost in the quarterfinals to Binghamton.