Tanner Mangum (born September 8, 1993) is an American former college football quarterback who played for the BYU Cougars.

He was named a special recognition MVP of the Under Armour All-America Game for switching to the losing black team when they were down to a single quarterback.

He was the Co-MVP of Elite 11 Camp, alongside future NFL first overall draft pick Jameis Winston.

[11][12] In his first career start he passed for 309 yards with two touchdowns and two interceptions and helped lead BYU to victory by completing a 35-yard touchdown pass on fourth-and-seven with 45 seconds left in the game to give BYU the lead.

Mangum's season would end the next week against Fresno State when he tore his Achilles tendon.

Later in the 2018 season with 3–3 BYU trailing to Utah State who possessed a commanding lead, Wilson replaced Mangum.