The 1991 LSU Tigers baseball team represented Louisiana State University in the 1991 NCAA Division I baseball season. The Tigers played their home games at Alex Box Stadium. The team was coached by Skip Bertman in his 8th season at LSU.
The Tigers won the College World Series, defeating Wichita State in the championship game.
The following members of the LSU Tigers baseball program were drafted in the 1991 Major League Baseball draft.