Dictatorship is only exhibited in 'The Silent King' where Xergiok takes control of the Goblin Kingdom by force, and by the Earl of Lemongrab, after the escape of Lemonhope, who turns the entirety of the Lemon Earldom into a totalitarian city-state until 'Lemonhope Part 2' that is now a constitutional monarchy city-state after both Lemongrab 1 and Lemongrab 2 exploded and Princess Bubblegum stitched them together to create Lemongrab 3, who took over as ruler of the earldom of Lemongrab. No republics are known to exist in the Land of Ooo.

A similar event called Princess Day is also held every year.

The Grand Meeting of Ooo Royalty shows that the various rulers of Ooo meet together (except Earl of Lemongrab) for discussions on a regular basis, though the topics are not revealed. Most kingdoms are ruled by one or more members of royalty, such as the Ice Kingdom and Fire Kingdom. King of Ooo subsequently ruled the land for a few months, but the citizens eventually rebelled against him and reinstated Bubblegum.

Candy Kingdom in particular slowly developed into a mix of absolute monarchy authoritarianism beginning in Season 2, culminating in the Season 6 finale, when the land held its first (and most likely only) election to replace Princess Bubblegum. Ooo exhibits a mix of democracy, dictatorship, feudalism, as well as what appears to be despotic monarchy in all of Kingdoms of Ooo except Fire Kingdom (an absolute hereditary monarchy), Ice Kingdom (a borderline of despotic or absolute monarchies as depends), and Candy Kingdom.

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