King Arthur is an important figure in English mythology, where he appears as the ideal of kingship both in war and peace. He is the central character in a cycle of legends known as the Matter of Britain. Although there has been debate over whether King Arthur might in fact have existed, like Robin Hood, he is generally considered a figure of myth and folklore, but one closely tied to both the literature and political history of Britain. Arthur and the Arthurian legends in general (including such figures as the wizard Merlin, Guinevere, and Lancelot), have often been portrayed, spoofed, or referenced in Muppet/Henson productions.
- The human character Prince Arthur Charming is named after the king, as evident by the song that plays when he is introduced in Hey Cinderella!. The song states that although he is named Prince Charming, he will become King Arthur.
- The various froggy friends of Kermit in The Frog Prince are named after knights from the Arthurian stories: Gawain, Ector, Gareth, and Kay.
- An irate King Arthur appeared in the May 1986 issue of the Muppet Babies comic book. He mistakes Baby Fozzie for Sir Fozalot.
- An Elvis portrayed King Arthur in Muppets Tonight episode 106, in a "Great Moments in Elvis History" sketch called "Elvis the King and his Knights of the Round Table". Besides the King, the sketch includes Queen Guenevere, Galahad and Dance-a-Lot.
- In the 1998 TV movie Merlin, which featured effects by Jim Henson's Creature Shop, Paul Curran appeared as Arthur.
- In the Muppet Babies episode "Muppets in Toyland," the characters take on the key roles from the Camelot saga: Baby Kermit as "Kermit Arthur," Baby Piggy as "Queen Piggyvere," Baby Animal as "Animerlin" and Rowlf, Skeeter, Fozzie and Gonzo as "The Knights of the Play Table."
- The Muppet Babies episode "The Spoon in the Stone" spoofs the Arthurian legends and especially T. H. White's The Sword in the Stone.
- In The Muppets on Puppets, during the fairy tale using hand puppets, King Fred uses the exclamation "Good Knights of the Round Table!"