A barrel is a cylindrical container, traditionally made with wooden material.

Barrel may also refer to:

• BARREL (Balloon Array for RBSP Relativistic Electron Losses), a NASA mission
• Barrel (album), a 1970 album by Lee Michaels
• Barrel (horology), a watch component
• Barrel (unit), several units of volume
• Barrel (wine), for fermenting or ageing wine
• Barrel (fastener), a simple hinge consisting of a barrel and a pivot
• Gun barrel
• the venturi of a carburetor
• a component of a clarinet
• a component of a snorkel
• a tank in Harry Turtledove's books; see Victoria: An Empire Under the Sun
• the outside of a low voltage DC connector
• "The Barrel", a song by Aldous Harding from her 2019 album Designer

• Barrel roll (disambiguation)
• All pages with titles containing Barrel
• Barrell, a surname
• Barrow (disambiguation)
• Beryl (disambiguation)
• Keg