King (Title)

King: A male monarchic ruler of the Kingdom. In the world of One Piece there are Royal Family who controls the local government.

All that I can do is human in nature...

- Words of Nefertari Cobra


 * Wapol was the King of Drum, he is also the first royal king to appear in the series. He was soon overthrown and soon his Royal Guards leader Dalton became an new king, changing Drum to Sakura Kingdom


 * Nefertari Cobra was the king of Arabasta. He is the 12th line of the House of Nefetari, Princess Vivi is the be the 13th in the line.


 * Thelessa Lucas is the king of Ilusia


 * There is an unnamed king of Lyneel

Pirate King
However, there are pirate kings in the story. Pirate kings are those who are the strongest pirates of the seas, thus ruling the seas and possess grand scale influence over lands across the world. To become the Pirate King, one has to conquer, brave the Grand Line  then progress into the New World to find One Piece.


 * Gol D. Roger was the first pirate king 22 years ago but suffered a disease, let off his fellow pirates and surrendered himself to Garp who had "cornered" him on many occasions. He left One Piece, the treasure that names this story and is sought after to have the title of "Pirate King". He is currently dead.


 * Monkey D. Luffy wants to be the Pirate King and has made considerable progress on his mission. Going from a single young man who narrowly survive a grave whirlpool in a barrel to getting on the borders on the New World with a crew numbered up to 9. He has singlehandedly leveled great structures and charged upon Enies Lobby, one of the main strongholds of the World Government for the most part alone. He is currently facing Blackbeard and his crew in level four in Impel Down.


 * Notably, Don Krieg aims to be the Pirate King as well and laughed at Luffy's ambition. He made a great start to his mission by somehow gathering the strength and wealth to form 5000 men and 50 grand ships despite being an East Blue settler with a 17,000,000 bounty (which is probably low as he uses sneaky tactics and kills those who could note his deeds). However, he was reduced to a starving 100 men with one ruined mother ship by the Shichibukai Mihawk. It is unknown what became of him after his defeat at Luffy.
 * Blackbeard, despite defeating and capturing Ace in a clash of "Sun and Darkness" and becoming a Shichibukai as a result of it. He wishes to become the Pirate King as well and notably is the first character in the entire series to respect Luffy's ambition from the start. He is also special for being the only character without a bounty to become a Shichibukai.