Zheng Kezang (1662–1681), birth name Qin (欽) or Qinshe (欽舍), was the crown prince and regency of the Kingdom of Tungning. Kezhang was the eldest son of Zheng Jing and Chen Zhaoniang, and his grandparents were Koxinga and Princess Dong.

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In 1662, Zheng was born in Xiamen; his mother was Chen Zhaoniang, who was one of the concubines of Zheng Jing. In 1679, Zheng became Jianguo Shisun (監國世孫), the crown prince and regency of Tungning.

In 1681, after Zheng Jing died, Kezang was killed by his uncle Zheng Cong in the "Tungning Coup" (東寧之變).

Princess Chen, Zheng's princess consort, committed suicide later. Zheng did not have any children.

Siblings:

• Zheng Keshuang (鄭克塽)
• Zheng Kexue (鄭克壆)