The 1998 LSU Tigers baseball team represented Louisiana State University in the 1998 NCAA Division I baseball season. The Tigers played their home games at Alex Box Stadium, and played as part of the Southeastern Conference. The team was coached by Skip Bertman in his fifteenth season as head coach at LSU.
The Tigers won the SEC West and reached the College World Series, their tenth appearance in Omaha, where they finished 3rd after recording wins against eventual champion USC and and two losses to USC in the semifinals.