A slot car or slotcar is a powered miniature automobile or other vehicle that is guided by a groove or slot in the track on which it runs. A pin or blade extends from the bottom of the car into the slot. Though some slot cars are used to model highway traffic on scenic layouts, the great majority are used in the competitive hobby of slot car racing or slot racing.

Slot car racing is the competitive hobby of racing with powered miniature autos which are guided by grooves or slots in the track on which they run.