"Aradia, Or, the Gospel of the Witches" is a book written by the American folklorist Charles Godfrey Leland, published in 1899. It is a collection of Italian witchcraft folklore and legends, particularly centered around the figure of Aradia, who is portrayed as a messianic figure and a female deity. Leland's work seeks to document and preserve the oral traditions and magical practices of Italian witches, presenting a narrative that emphasizes the importance of witchcraft as a form of resistance against oppression and social injustice.

The book delves into various aspects of folk magic, including spells, rituals, and incantations, providing insight into the beliefs and practices of Italian witchcraft as understood by Leland. It also discusses the historical context of witchcraft in Italy and its connections to ancient pagan traditions. "Aradia, Or, the Gospel of the Witches" has since become a significant source for contemporary Wiccan and neopagan traditions, contributing to the revival and reinterpretation of ancient magical practices and beliefs.