Lot No. 249 is a Gothic horror short story by British writer Arthur Conan Doyle, first published in Harper's Magazine in 1892.

The story tells of a University of Oxford athlete named Abercrombie Smith who notices a strange series of events surrounding Edward Bellingham, an Egyptology student who owns many ancient Egyptian artefacts, including a mummy. After seeing his mummy disappear and reappear, and two instances of Bellingham's enemies getting attacked, Smith concludes that Bellingham is reanimating his mummy. Smith confronts Bellingham, who denies this is the case; the next day, Smith is attacked by the mummy and escapes. Smith then forces Bellingham to destroy his mummy and the associated artefacts at gunpoint. Written during a period of great European interest in Egyptian culture known as Egyptomania, Lot No. 249 was inspired by Doyle's interests in the supernatural, crime and Egyptology. Though reanimated mummies had previously appeared in English literature, Doyle's story was the first to portray one as dangerous. The story has been widely anthologised and received positive reviews from critics, including praise from authors H. P. Lovecraft and Anne Rice. Critics have compared the story to the writings of Edgar Allan Poe and H. Rider Haggard and interpreted it as containing themes of imperialism and masculinity. Lot No. 249 has been adapted for film and television, and has significantly influenced subsequent media that depicts mummies, as well as other works of horror fiction.