Darrell Charles Schweitzer (born August 27, 1952) is an American writer, editor, and critic in the field of speculative fiction.

[5] He worked as an editorial assistant for Isaac Asimov's SF Magazine from 1977 to 1982 and Amazing Stories from 1982 to 1986, was co-editor with George H. Scithers and John Gregory Betancourt of Weird Tales from 1987 to 1990 and sole editor of the same magazine from 1991 to 1994 and its successor, Worlds of Fantasy & Horror, from 1994 to 1996.

His latest novel, The Dragon House (2018), melds his customary dark tone with elements of humor in a lighter work for young adults.

Other works include his stories of the lapsed knight Julian, most collected in We Are All Legends (1981),[4] his tales of legendary madman Tom O'Bedlam, numerous works using H. P. Lovecraft's Cthulhu Mythos, many collected in Awaiting Strange Gods: Weird and Lovecraftian Fictions (2015), and a large body of unconnected short stories.

Schweitzer is an authority on the history of speculative fiction and has written numerous critical and bibliographical works on both the field in general and such writers as Lord Dunsany, H. P. Lovecraft, and Robert E. Howard.