List of Thai monarchs

King of Thailand
King of Thailand
พระมหากษัตริย์ไทย
	Royal Standard (since 1910)
Incumbent
	Vajiralongkorn (Rama X); since 13 October 2016
Details
Style	His Majesty
Heir presumptive	Dipangkorn Rasmijoti
First monarch	Si Inthrathit
Formation	1238
Residence	Grand Palace (ceremonial); Dusit Palace (residential);
Website	royaloffice.th

The succession of Thai monarchs began with Si Inthrathit at the establishment of the first Thai kingdom in 1238. With brief interruptions, 55 monarchs have ruled over four successive kingdoms, the current monarch being Vajiralongkorn (Rama X) of the Chakri dynasty.