Seon Manley (January 7, 1921 – March 11, 2009), was an American editor and author who worked with her sister Gogo Lewis.

Her mother died while she was young and she and her sister were sent to live with their grandparents in New York for a time.

Manley began editing books for Vanguard, including critical works like those by Eugene Jolas.

Manley also edited anthologies of horror stories, mostly with her sister Gogo Lewis.

Manley also wrote about the places and people she encountered and various times in her life in a series of mostly autobiographical books.