Ballast may mean:

• Track ballast, railway track-bed, on which sleepers and track is laid
• Sailing ballast, ship's ballast, used to weight a ship down
• Ballast tanks, a device used on submarines and other submersibles to control buoyancy
• Ballast (electrical), used to stabilize the current flow in lamps

Places:

• Ballast (Drenthe), a village in Drenthe, Netherlands

Ship construction

Ballast | Ballast | Balasto | Ballastbed