Charles Godfrey Leland was an American humorist and folklorist, born in Philadelphia, Pennsylvania. He was educated at Princeton University and in Europe.

Aradia, or the Gospel of the Witches is a book composed by the American folklorist Charles Godfrey Leland that was published in 1899. It contains what he believed was the religious text of a group of pagan witches in Tuscany, Italy that documented their beliefs and rituals. Historians and folklorists have disputed the existence of such a group. During the 20th century, the book was influential in the development of the contemporary Pagan religion of Wicca.