The 2018–19 Cal State Fullerton Titans men's basketball team represented California State University, Fullerton in the 2018–19 NCAA Division I men's basketball season. The Titans were led by sixth-year head coach Dedrique Taylor and competed at the Titan Gym. CSU Fullerton was a member of the Big West Conference, and participated in their 45th consecutive season in that league. They finished the season 16–18, 10–6 in Big West play to finish in a tie for second place. On March 15, Fullerton defeated UCSB to reach the finals of the Big West tournament, where they played 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. They were in