The Number of the Beast may refer to:

• Number of the Beast, commonly linked to 666, a biblical prophecy from the Book of Revelation
• Number of the Beast (occurrence), historic and modern day occurrences of 666
• The Number of the Beast (novel), by Robert Heinlein
• The Number of the Beast (album), an album and song by Iron Maiden, also covered by Dream Theater and Iced Earth
• "The Number of the Beast", an episode of Digimon Adventure
• "The number of the beast is 666" is a painting by William Blake

See also: 666 (disambiguation)

The Number of the Beast