Philip Douglas Beidler (October 29, 1944 - April 20, 2022) was an American academic and author. He was a professor of American literature at the University of Alabama, and the author and editor of books on Alabama literature, the Vietnam War, and other topics. For his work on Vietnam writers, he has been called "one of the founding fathers of Vietnam War studies".

Beidler, who was of German and Quaker