"I am retiring from coaching football. I want to thank Jerry Jones and Stephen Jones for their tremendous support over the last four years," Bill Parcells said in a statement.
"Also, the players, my coaching staff and others in the support group who have done so much to help. Dallas is a great city and the Cowboys are an integral part of it. I am hopeful that they are able to go forward from here.
"I am in good health and feel lucky to have been able to coach in the NFL for an extended period of time.
"I leave the game and the NFL with nothing but good feelings and gratitude to all the players, coaches and other people that have assisted me in that regard."