Pratap Singh Bhonsle or Pratapsinha was the Maratha ruler of Thanjavur of the Bhonsle dynasty from 1739 to 1763. His rise to power followed three years of anarchy and civil war and restored the state to its previous greatness. His reign witnessed the Carnatic Wars and the Seven Years' War.

Chanda Sahib was a subject of the Carnatic Sultanate between 1749 and 1752. Initially he was supported by the French during the Carnatic Wars. After his defeat at Arcot in 1751, he was captured by the Marathas of Thanjavur and executed.