Fey may refer to:
- A word meaning "wild or crazy acting", often ascribed to supernatural causes and evidenced by abnormal behavior (cognate to Old Norse feigr, German feige). In Scottish superstition, supernatural abilities such as prophecy (not necessarily related to dying or death).
- A common spelling for fay ("a fairy"), unrelated to the previous.
- A fairly rare term for "grey" in heraldic hatching.
- A German or Irish name found as both a first and last name.
- Tina Fey or Elizabeth Stamatina "Tina" Fey (born 1970), American writer, comedian and actress.
- Otherworldly; as "An Aquarian can be "fey" in their interactions with others"...
Toponyms:
- Fey, Switzerland, a municipality in the district of Echallens in the canton of Vaud.
- Féy, Moselle, a small village, located in the Moselle département in France.
Popular culture:
- Fey (born María Fernanda Blásquez Gil in 1973), Latin Grammy Award-nominated Mexican pop artist.
- Fey (album), eponymous debut album of Mexican pop singer Fey, released in 1995.
- Fey (Dungeons & Dragons), a type of creature in the Dungeons & Dragons fantasy roleplaying game.
- Fey (novels), series of fantasy novels by Kristine Kathryn Rusch
- Fey Clan, a family of mostly female mystics in the Phoenix Wright series of games.
- Fey Truscott-Sade, also known as Fey or Feyde, a fictional character who appeared in the Doctor Who Magazine comic strip.
- Fey Sommers, a character in Ugly Betty.