The 1939 Cotton Bowl Classic was the third edition of the postseason college football bowl game, between the St. Mary's Gaels and the Texas Tech Red Raiders.

The Cotton Bowl Classic is an American college football bowl game that has been held annually in the Dallas–Fort Worth metroplex since January 1, 1937. The game was originally played at its namesake stadium in Dallas before moving to Cowboys Stadium in nearby Arlington in 2010. Since 2014, the game has been sponsored by the Goodyear Tire and Rubber Company and officially known as the Goodyear Cotton Bowl Classic; it was previously sponsored by Mobil (1989–1995) and Southwestern Bell Corporation/SBC Communications/AT&T (1997–2014).