Lt. Gen. Douglas Edward Lute (born November 3, 1952) is a retired United States Army lieutenant general and public servant who served as the United States Permanent Representative to NATO from 2013 to 2017. He was nominated for the post by President Obama on May 23, 2013, confirmed by the Senate on August 1, 2013 by voice vote, and assumed his position on September 3, 2013.

On May 15, 2007, Lute was appointed by George W. Bush to serve as Assistant to the President and Deputy National Security Advisor for Iraq and Afghanistan. The New York Times referred to him as the "War Czar", since he occupied a senior advisory position responsible for overseeing the wars in Iraq and Afghanistan. He was asked to stay on by new President Barack Obama as Obama's Special Assistant and Senior Coordinator for Afghanistan and Pakistan. After leaving active duty in 2010, Lute remained in his position at the National Security Staff. He is married to Jane Holl Lute, who was the Deputy Secretary of Homeland Security from 2009 to 2013.