Zuo Zongtang (November 10, 1812 - September 5, 1885), spelled Tso Tsung-t'ang in Wade-Giles was a Chinese statesman and military leader of the late Qing Dynasty. He was born in Wenjialong, north of Changsha in Hunan province. He served in China's northwestern regions, quelling the Dungan revolt and various other disturbances.

He served with distinction during the Qing Empire's civil war against the Taiping Rebellion, in which it is estimated 20 million people died. After this military success, he marched west with his 120,000 strong army, winning many victories against the rebellious Muslims of Northwestern China including today's Shaanxi, Ningxia, Gansu and Qinghai provinces and Xinjiang in the 1870s.

In 1878, he successfully suppressed Yakub Beg's uprising in Xinjiang and helped to negotiate an end to Russian occupation of the border city of Ili. He was vocal in the debate at the Qing Imperial court over what to do with the Xinjiang situation, advocating for Xinjiang to become a province.