The Black Flame is a post-apocalyptic science fiction novel by American writer Stanley G. Weinbaum, originally published in hardcover by Fantasy Press in 1948.

[5] The novel starts several hundred years after most of mankind is wiped out by a plague and tells the story of a family of immortals who seek to conquer the world with advanced science.

[7] Sam Moskowitz praised the Fantasy Press edition, noting that "the Weinbaum method of story delineation is as effective as ever.

"[8] Thrilling Wonder Stories also reviewed the volume favorably, saying that "Weinbaum wrote easily and vividly and his characterization is such that the reader never fails to feel the pressing and urgent reality of what is actually arrant make-believe.

"[10] Samuel R. Delany compared Black Margot to Joanna Russ's Jael and William Gibson's Molly, declaring Weinbaum "a man particularly concerned with the construction of his female characters.