Stopper may refer to:

• Bung, a plug used to stop the opening of a container
  • Laboratory rubber stopper, a specific type of bung
• Plug (sanitation), used to stop a drainage outlet
• Defender (association football), in soccer (association football)
• Milkor 37/38mm and 40mm Stopper, a gun
• Alternative name for a whitewater hole, in whitewater kayaking
• A local train that calls at almost every station, including very small ones
• Stopper, in the game of bridge
• Stopper, in baseball, a key starting or relief pitcher
• Slang for stopwatch, a handheld timepiece designed to measure the amount of time
• Stopper knot, a type of a knot at the end of the rope
• Stopper, a common name for some plant species in the genus Eugenia

• All pages with titles containing stoppers
• All pages with titles containing stopper
• Stop (disambiguation)