The 2015–16 Long Beach State 49ers men's basketball team represented California State University, Long Beach during the 2015–16 NCAA Division I men's basketball season.

The 49ers were led by ninth year head coach Dan Monson and played their home games at Walter Pyramid.

They were members of the Big West Conference.

They defeated UC Riverside and UC Irvine to advance to the championship game of the Big West tournament where they lost to Hawaii.

They lost in the first round of the Big West tournament to Hawaii.