Thado Dhamma Yaza I (Burmese: သတိုးဓမ္မရာဇာ, pronounced [ðədó dəma̰ jàzà]; c. 1490s–1551) was viceroy of Prome (Pyay) from 1542 to 1550 during the reign of his son-in-law King Tabinshwehti of Toungoo Dynasty of Burma (Myanmar), and the self-proclaimed king of the city-state from 1550 to 1551. After the death of Tabinshwehti in 1550, the man who started out as a royal household servant of Tabinshwehti in 1516 declared himself king of Prome with the style of Thado Thu (သတိုးသူ, [ðədó θù]), and did not submit to Bayinnaung, Tabinshwehti's chosen successor. His fortified city-state fell to Bayinnaung's forces in 1551 after a six-month battle. He was executed on the order of Bayinnaung, who later regretted the decision.