The 1985 Cal State Fullerton Titans football team represented California State University, Fullerton as a member of the Pacific Coast Athletic Association (PCAA) during the 1985 NCAA Division I-A football season. Led by sixth-year head coach Gene Murphy, Cal State Fullerton compiled an overall record of 6–5 with a mark of 5–2 in conference play, placing second in the PCAA. The Titans played their home games at Santa Ana Stadium in Santa Ana, California.