The 1908 LSU Tigers football team represented the LSU Tigers of Louisiana State University during the 1908 college football season. The Tigers were coached by Edgar Wingard and posted a perfect 10–0 record, outscoring opponents 442 to 11. The team played its home games at State Field and competed as members of the Southern Intercollegiate Athletic Association (SIAA).

The 1908 college football season ran from Saturday, September 19, to November 28. The Penn Quakers and the Harvard Crimson each finished the season unbeaten but with one tied. The LSU Tigers went unbeaten and untied against a weaker opposition. All three teams were named national champions retroactively by various organizations. Only Pennsylvania officially claims a national championship for the 1908 season.