The 2023 Cal State Fullerton Titans baseball team represented California State University, Fullerton during the 2023 NCAA Division I baseball season.

The Titans played their home games at Goodwin Field.

The Titans finished 22–33 overall, and 14–16 in the conference, and they failed to qualify for the 2022 NCAA Division I baseball tournament.

It was the program's third consecutive season with a losing streak.

^ Collegiate Baseball ranked 40 teams in their preseason poll, but only ranked 30 teams weekly during the season.† NCBWA ranks 35 teams in their preseason poll, but only ranks 30 teams weekly during the season.