Duke Huan of Zheng (simplified Chinese: 郑桓公; traditional Chinese: 鄭桓公; pinyin: Zhèng Huán Gōng), personal name Ji You, was the founding duke of the Zheng state, a dynastic vassal state of the Zhou dynasty.
In 806 BC, he was bestowed the land of Zheng (northwest of modern Hua County, Shaanxi) by King Xuan of Zhou.
In 773 BC, the 33rd year of the reign of Duan Huan of Zheng, King You of Zhou accorded him the position of situ (Minister of Land) due to the people's love for him.
Due to the instability during the rule of King You of Zhou, Duke Huan of Zheng consulted Taishi Bo (太史伯) on his opinions on state relocation.
Duke Huan expressed that he wished to move the country to the west or to the Yangtze River Basin.