The 2019–20 Cal State Fullerton Titans men's basketball team represented California State University, Fullerton in the 2019–20 NCAA Division I men's basketball season.

The Titans, led by seventh-year head coach Dedrique Taylor, played their home games at the Titan Gym in Fullerton, California as members of the Big West Conference.

However, the Big West tournament was canceled amid the COVID-19 pandemic.

In the Big West tournament, they defeated UC Davis in the quarterfinals,[1] and UC Santa Barbara in the semifinals,[2] advancing to the championship game against top-seeded UC Irvine, in an attempt to reach the NCAA tournament for the second successive year; however, the Titans were handily defeated by the Anteaters, 92–64, in a rematch of the previous year's championship.

[3] They were invited to the CIT, where they fell to Cal State Bakersfield in the first round.