A cult following refers to a group of fans who are highly dedicated to some person, idea, object, movement, or work, often an artist, in particular a performing artist, or an artwork in some medium. The lattermost is often called a cult classic. A film, book, musical artist, television series, or video game, among other things, is said to have a cult following when it has a small but very passionate fanbase.

A common component of cult followings is the emotional attachment the fans have to the object of the cult following, often identifying themselves and other fans as members of a community. Cult followings are also commonly associated with niche markets. Cult media are often associated with underground culture, and are considered too eccentric or anti-establishment to be appreciated by the general public or to be widely commercially successful.

Many cult fans express their devotion with a level of irony when describing such entertainment, considering it so bad that it is good. Sometimes, these cult followings cross the border to camp followings. Fans may become involved in a subculture of fandom, either via conventions, online communities or through activities such as writing series-related fiction, costume creation, replica prop and model building, or creating their own audio or video productions from the formats and characters.