Kingdom

A kingdom is a territory of land that is under the dominion of a king or queen.

Mainstream Smurfs Media
In mainstream Smurfs media, two known human kingdoms that exist include the Good King's kingdom from the Johan And Peewit stories and King Gerard's kingdom from the Smurfs cartoon show. There are also other kingdoms that exist with non-human kings and queens ruling over them, including a short-lived Smurf kingdom in which the character King Smurf was the ruler over until civil war broke out and Papa Smurf returned.

Empath: The Luckiest Smurf stories
In the EMPATH: The Luckiest Smurf story series, Smurvanya was the name of the kingdom that a family of Smurfs had rulership over until its last member of royalty, Lord Vladimir Smurfula, was turned into a vampire and imprisoned inside a coffin to keep him from terrorizing his fellow Smurfs. After that point, the kingdom was dissolved and the Smurfs ruled mostly over themselves until an unknown plague had killed most of the Smurfs within Papa Smurf's generation, resulting in Papa Smurf himself becoming the sole leader and father figure of nearly a hundred young Smurfs.