The 2005 Texas Tech Red Raiders football team represented Texas Tech University as a member of the Big 12 Conference during the 2005 NCAA Division I-A football season.

In their sixth season under head coach Mike Leach, the Red Raiders compiled an overall record of 9–3 record with a mark of 6–2 in conference play, finished in a tie for second place in Southern Division of the Big 12, lost to Alabama in the 2006 Cotton Bowl Classic, and outscored opponents by a combined total of 473 to 226.

[1] The team played its home games at Jones SBC Stadium in Lubbock, Texas.

The Red Raiders finished the regular season with a 31–15 upset victory over the no.

Hodges's 643 passing yards are the fourth most by a quarterback in Division I-A (now Division I FBS) and the second time a Texas Tech quarterback threw for over 600 yards in a single game, with B. J. Symons throwing for 661 yards against Ole Miss in 2003.