A skeleton key is a key that has been filed in such a way as to bypass the security measures placed inside a warded lock.
Skeleton Key may also refer to:
- Skeleton Key (novel), a novel by Anthony Horowitz published in 2002
- The Skeleton Key, a detective novel by Bernard Capes, published posthumously in 1920
- Skeleton Key (band), a rock band
- Skeleton Key (comics), a comic book by Andi Watson
- The Skeleton Key, a 2005 film
- Skeleton Key: A Dictionary for Deadheads, a book by David Shenk and Steve Silberman
- "Skeleton Key", a song by Days of the New from their second album
- "The Skeleton Key", a song by Epica from Omega
- Skeleton Key Records, a Liverpool-based independent record label
- Skeleton Key attack - a technique involving patching the lsass.exe process to bypass authentication in Microsoft Active Directory