Spool may refer to:

• Spool, a usually low-flanged or unflanged cylinder on which thread, wire, cable, paper, film, or tape is wound for distribution or use.
  • Bobbin, a cylinder or reel on which a quantity of thread, yarn or wire is wound for use in a particular machine or device
  • Cable reel used to carry various types of electrical wires
• Spool (software company), a software company that allows users to save video and text onto their mobile devices to view the content offline
• Spooling, Simultaneous Peripheral Operations On-line, transferring data between media concurrently with other work, in computing
• Spool (turbine), a shaft of a gas turbine engine or turbocharger. "Spooling up" usually refers to a turbine engine spinning up
• Spool (pool), a large spa/small pool (an insulated inground small pool with spa jets built-in, named by Insulated Water Structures)
• Spool (axle), a term for a solid axle, one which does not have a differential to allow a wheel speed difference from side to side
• Spool (band), a band from London, Canada in the 1990s who released music on "Derivative Records"
• Spool (pipe), a short length (5-10m but sometimes up to 80m) of rigid pipe typically used to tie in a pipeline to a structure
• Spool (record label), active from 1998–2008