The 1986 Cal State Fullerton Titans football team represented California State University, Fullerton as a member of the Pacific Coast Athletic Association (PCAA) during the 1986 NCAA Division I-A football season. Led by seventh-year head coach Gene Murphy, Cal State Fullerton compiled an overall record of 3–9 with a mark of 2–5 in conference play, tying for sixth place in the PCAA. The Titans played their home games at Santa Ana Stadium in Santa Ana, California.