William Daniel Ehrhart (born September 30, 1948 in Roaring Spring, Pennsylvania) is an American poet, writer, scholar and Vietnam veteran. Ehrhart has been called "the dean of Vietnam war poetry." Donald Anderson, editor of War, Literature & the Arts, said Ehrhart’s Vietnam-Perkasie: A Combat Marine Memoir, is “the best single, unadorned, gut-felt telling of one American’s route into and out of America’s longest war.” Ehrhart has been an active member of Vietnam Veterans Against the War (VVAW). He was a 1993 Pew Fellowships in the Arts.