The Yongzheng Emperor (Yinzhen; 13 December 1678 – 8 October 1735) was the fourth Emperor of the Qing dynasty, and the third Qing emperor to rule over China proper. He reigned from 1722 to 1735. A hard-working ruler, the Yongzheng Emperor's main goal was to create an effective government at minimal expense. Like his father, the Kangxi Emperor, the Yongzheng Emperor used military force to preserve the dynasty's position.

Although Yongzheng's reign was much shorter than that of both his father (the Kangxi Emperor) and his son (the Qianlong Emperor), the Yongzheng era was a period of peace and prosperity. The Yongzheng Emperor cracked down on corruption and reformed the personnel and financial administration. His reign saw the formation of the Grand Council, an institution which had an enormous impact on the future of the Qing dynasty.