Accidental may refer to:
Look up accidental in Wiktionary, the free dictionary.
- Accidental (music), a symbol which changes the pitch of a note
- Accidental (album), by Fred Frith
- Accidental (biology), a biological phenomenon more commonly known as vagrancy
- The Accidental, a 2005 novel by Ali Smith
- The Accidental (band), a UK folk band
- Accidental property, a philosophical term