The 1984 Cal State Fullerton Titans football team represented California State University, Fullerton as a member of the Pacific Coast Athletic Association (PCAA) during the 1984 NCAA Division I-A football season.
Led by fifth-year head coach Gene Murphy, Cal State Fullerton finished the season with an overall record of 11–1 and a mark of 6–1 in conference play, placing second in the PCAA behind UNLV, who dealt the Titans their only defeat of the season.
This was the fourth home venue for the Titans in three years, but they continued playing in Santa Ana Stadium for the next eight season.
[1] With the forfeit from UNLV, Cal State Fullerton's 1984 record improved to 12–0 overall and 7–0 in conference play, giving the Titans the PCAA title.
[2] 1984 was the most successful of the Cal State Fullerton Titans football program's 23 seasons of competition.