Stocks are devices used since medieval times for public humiliation, corporal punishment, and torture. The stocks are similar to the pillory and the pranger, as each consists of large, hinged, wooden boards; the difference, however, is that when a person is placed in the stocks, their feet are locked in place, and sometimes as well their hands or head, or these may be chained. Also, some versions have small strings to hold the toes in place. The victim is in a sitting position.

With stocks, boards are placed around the legs or the wrists, whereas in the pillory they are placed around the arms and neck and fixed to a pole, and the victim stands. However, the terms can be confused, and many people refer to the pillory as the stocks.

The practice of using stocks continues to be cited as an example of cruel and unusual punishment.