Christopher Ash (born December 24, 1973) is an American football coach who is the defensive coordinator of the Notre Dame Fighting Irish.

He served as the head coach of the Rutgers Scarlet Knights from 2016 to 2019, and defensive coordinator of the Wisconsin Badgers, Arkansas Razorbacks, Ohio State Buckeyes, and Texas Longhorns.

He has also previously coached for the Jacksonville Jaguars and Las Vegas Raiders of the National Football League (NFL).

[4] In January 2014, Ash was hired as the co-defensive coordinator and secondary coach for the Ohio State Buckeyes.

[7] Ash spent the rest of the 2019 season as an analyst at the University of Texas at Austin.