King Smurf's castle was the center location of King Smurf's activities in the comic book and 1980s cartoon show versions of the story "King Smurf". It was here where King Smurf lived and ruled over the Smurf Village while Papa Smurf was away. The castle had a throne room, a bedchamber, and a prison.
In both versions of the story, King Smurf forced his fellow Smurfs to build a castle for his permanent residence. During its existence, Jokey became a prisoner in its prison (which in the comic book version would be followed by Brainy) after he pulled one of his "surprise" pranks on King Smurf. Near the end of the story, the castle would be destroyed by an explosive from Papa Smurf's laboratory in the comic book version, while in the cartoon show version a deluge of water released from the village dam would destroy the castle.