A witch ball is a hollow sphere of glass. Historically, witch balls were hung in cottage windows in 17th and 18th century England to ward off evil spirits, witches, evil spells, ill fortune and bad spirits.

The Witches ball is still today used extensively throughout Sussex, England and continues to hold great superstition with regard to warding off evil spirits in the English counties of East Sussex and West Sussex. The tradition was also taken to overseas British colonies, such as the former British colonies of New England, and remains popular in coastal regions. Examples of the Witches ball in use can be seen in the windows of houses throughout the counties anywhere from small rural villages to coastal towns and cities. Examples can also be seen in shop windows as well, often not for sale as they are so highly prized.