Number One Fan may refer to:
Number One Fan (band), a rock band based in Appleton, Wisconsin Number One Fan (film), a 2014 French comedy-drama film Number One Fan (TV series), a 2026 British TV series "Number One Fan", song by Muna from the album Saves the World "#1 Fan", song by LL Cool J from the album Todd Smith
See also Fan (person) Superfan (disambiguation)