Cheng Yu-tung GBM (simplified Chinese: ???; traditional Chinese: ???; pinyin: Zhèng Yùtóng; Sidney Lau: Jeng6 Yue6 Tung4; 8 August 1925 – 29 September 2016) was a Hong Kong billionaire with extensive property investment, development and service businesses, hotels, infrastructure, jewellery retailing and transportation interests in Hong Kong, Macau, United States, Australia and other areas.
He was considered to be Hong Kong's third richest man at the time of his death.