William "Bill" Daniel Ehrhart (born September 30, 1948) is an American poet, writer, scholar and Vietnam veteran.

Ehrhart, an infantry sergeant, was awarded the Purple Heart for injuries he received while fighting in Hue City.

Over the years, he has held a wide variety of jobs, from merchant seaman to newspaper reporter to high school teacher.

He has written essays and articles on such topics as radio disc jockeys, tugboats on the Delaware River, the Internal Revenue Service, and a variety of modern and contemporary poets including William Wantling and Daniel Hoffman.

His poetry also reflects "his respect for nature, his love of friends, his active engagement with the world around him, and his consternation at the human condition".