Duke Zao of Qin

Duke Zao of Qin (, died 429 BC), personal name unknown, was a duke of the state of Qin during the Eastern Zhou dynasty, reigning from 442 to 429 BC. Duke Zao succeeded his father Duke Ligong, who died in 443 BC, as ruler of Qin.

In 441 BC, the Qin city of Nanzheng (in present-day Hanzhong) rebelled. In 430 BC, the Rong state of Yiqu invaded Qin, advancing to the Wei River.

Duke Zao reigned for 14 years and died in 429 BC. He was succeeded by his younger brother Duke Huai, who had been exiled in the state of Jin.