Tho Kyaung Bwa (Burmese: သိုကြောင်ဘွား, [ðò dʑàʊɴ bwá]) was sawbwa (ruler) of Onbaung from c. 1400s to c. 1420s. He became a vassal of Ava in 1404/05. In a marriage of state, he married a niece of King Minkhaung I of Ava. In 1412/13, he reported to the Ava court that his Shan-speaking state had come under attack from the neighboring Shan state of Hsenwi (Theinni), backed by Ming China. Minkhaung sent his son Crown Prince Minye Kyawswa to drive out the Hsenwi and Chinese forces.
The next ruler of Onbaung mentioned in the royal chronicles is Le Than Bwa in 1425. Chronicles do not say when exactly Tho Kyaung Bwa ceased to be the sawbwa or if and how Le Than Bwa was related to him.