Ellen Datlow (born December 31, 1949) is an American science fiction, fantasy, and horror editor and anthologist.She was editor of the webzine Event Horizon: Science Fiction, Fantasy, and Horror from 1998 through 1999, and was the editor of Sci Fiction until it ceased publication with its last piece of fiction, December 28, 2005. She currently is consulting editor for "Tor.com."Datlow won the Hugo Award for Best Professional Editor in 2002 and 2005, and the Hugo for Best Short Form Editor in 2009 and 2010. Her editing work has also been recognized with three Bram Stoker Awards, nine World Fantasy Awards, two International Horror Guild Awards for Best Anthology, two Shirley Jackson Awards for Best anthology, five Locus Awards for Best Editor.

She was named recipient of the 2007 Karl Edward Wagner Award, given at the British Fantasy Convention for "outstanding contribution to the genre." In 2011 she was given the Life Achievement Award by the Horror Writers Association.She is a long time trustee of the Horror Writers Association. She has been the co-host of the Fantastic Fiction reading series at the KGB Bar since 2000, a series which features luminaries and up-and-comers in speculative fiction.Datlow won the World Fantasy Award for Life Achievement in 2014.She won Hugo Award for Best Editor, Short Form in 2014.