The 2004 LSU Tigers baseball team represented Louisiana State University in the 2004 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 Smoke Laval in his third season as head coach at LSU.
The Tigers finished second in the SEC West, swept the Baton Rouge Regional and Super Regional, then reached the College World Series, their thirteenth appearance in Omaha, where they were eliminated after a pair of losses to Miami (FL) and South Carolina.