Zheng Xiaosong (Chinese: ???; September 1959 – 20 October 2018) was a Chinese politician and diplomat.
He was Director of the Macau Liaison Office, a ministerial-level position, until he fell to his death from his residence in October 2018.
He formerly served as Deputy Director of the International Liaison Department of the Communist Party of China, Vice Governor of Fujian Province, and secretary-general of the Fujian Provincial Committee of the Communist Party of China (CPC).
Zheng was a member of the 19th Central Committee of the Communist Party of China and a delegate to the 13th National People's Congress.