List of Kings in One Piece
- Wapol was the king of Drum Island, he is also the first royal king to appear in the series. He was soon overthrown twice by his Royal Guards leader Dalton and, through his rise back to power with the Baku Baku no Mi, became king of the Black Drum Kingdom
- Dalton became the new king of Drum Kingdom after overthrowing Wapol, changing it to Sakura Kingdom.
- Nefertari Cobra is the king of Alabasta. He is the 12th line of the House of Nefertari, Princess Vivi is designated to be the 13th ruler in the line.
- Thalassa Lucas is the king of Ilusia 6 years before the start of the series.
- There was an unnamed king in an unknown kingdom 15 years before the start of the series, who nearly surrendered his kingship to pirates, had Rob Lucci not executed the 500 soldiers being held hostage.
- Emporio Ivankov is the king/queen of Kamabakka Queendom.
- There was an unnamed king ruling Goa Kingdom 12 years before the start of the series.
- Neptune is the king of Ryugu Kingdom. His sons are the princes Fukaboshi, Ryuboshi, and Manboshi, and his daughter is the princess Shirahoshi.
- In the third movie, Mobambi became the new ruler of Crown Island.
- Wapol's father was ruling when Gol D. Roger was executed. His death led to his son succeeding him.
- There was an unnamed king of Lvneel 400 years before the start of the series.
- There was an unnamed king in an unknown kigdom 15 years before the start of the series, that travelled to Kamabakka Queendom, and came back as an okama, which tore both their family and the country apart, leading to the prince to turn to piracy.
- In the third movie, Kirin Lion was the "Animal King" of Crown Island until his death.
- Donquixote Doflamingo was the king of Dressrosa before renouncing his royal status along with his title of Shichibukai.
- Chopper was thought to be the new king of Crown Island until proven wrong.
- Hody Jones gave himself the title of king after overthrowing the Ryugu Kingdom.
King as an Epithet
- Gol D. Roger: Pirate King
- Eric Dow (filler): King
- Masira: Salvage King
- Shoujou: Sonar King
- Montblanc Noland: King of Liars
- Sogeking: King of Snipers
- Ryuma: The King
- Silvers Rayleigh: Dark King
- Avalo Pizarro: Corrupt King
- Brook: Soul King
- King - Wikipedia article about the King title.