The term Blackbeard can refer to:
- Marshall D. Teach (commonly referred to as "Blackbeard"), a major antagonist, a Emperor, captain of the Blackbeard Pirates, a former Warlord of the Sea, and a contender for Pirate King.
- Blackbeard Pirates, a pirate crew led by Marshall D. Teach.
- Kurotsuru (also called "Doctor Black Beard"), a doctor from Ace's mini-story.
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