How many Dragon Kings rule the seas in Chinese mythology? The traditional Dragon Kings of the seas number four, one for each of the Four Seas and the four cardinal directions.
The Four Dragon Kings are generally identified as Ao Guang of the East Sea, Ao Qin of the South Sea, Ao Run of the West Sea, and Ao Shun of the North Sea. Their domains are mythological rather than a precise map of modern oceans, but they reflect the traditional Chinese idea of the world arranged around a central realm with seas at its four boundaries.
Dragon Kings are water and weather deities. They are associated with rain, storms, rivers, tides, and underwater palaces, and stories often portray them as powerful rulers who must answer to the Jade Emperor. Ao Guang is especially prominent in stories about Nezha and in Journey to the West.
The number four applies specifically to the Dragon Kings of the Four Seas. Other religious and literary traditions sometimes describe five Dragon Kings, linked to five directions, or eight dragon kings in Buddhist contexts. Those broader traditions do not overturn the standard quiz answer when the question refers to the sea-ruling Four Seas group.