Nathan Alexander Sales is an American lawyer, academic, and government official who served as the coordinator for counterterrorism and special envoy to the Global Coalition to Defeat ISIS within the U.S. Department of State from 2017 to 2021. Prior to public service he was an associate professor at Syracuse University College of Law, where his fields of research included national security law, counterterrorism law, administrative law, and constitutional law. Sales was also of counsel at the law firm Kirkland & Ellis.

The Coordinator for Counterterrorism heads the Bureau of Counterterrorism and Countering Violent Extremism, which coordinates U.S. government efforts to fight terrorism. As the head of the counterterrorism bureau, the coordinator for counterterrorism has the rank of both ambassador-at-large and assistant secretary.