A boggart is a supernatural being from English folklore. The dialectologist Elizabeth Wright described the boggart as 'a generic name for an apparition'; folklorist Simon Young defines it as 'any ambivalent or evil solitary supernatural spirit'. Halifax folklorist Kai Roberts states that boggart ‘might have been used to refer to anything from a hilltop hobgoblin to a household faerie, from a headless apparition to a proto-typical poltergeist’. As these wide definitions suggest boggarts are to be found both within and out of doors, as a household spirit or a malevolent genius loci inhabiting fields or other topographical features.The 1867 book Lancashire Folklore by Harland and Wilkinson, makes a distinction between "House boggarts" and other types. Typical descriptions show boggarts to be malevolent. It is said that the boggart crawls into people's beds at night and puts a clammy hand on their faces. Sometimes he strips the bedsheets off them. The household boggart may follow a family wherever they flee. One Lancashire source reports the belief that a boggart should never be named: if the boggart was given a name, it could neither be reasoned with nor persuaded, but would become uncontrollable and destructive.

English folklore consists of the myths and legends of England, including the English region's mythical creatures, traditional recipes, urban legends, proverbs, superstitions, and folktales. Its cultural history is rooted in Celtic, Christian, Nordic and Germanic folklore.