Stephen Shing-Toung Yau (Chinese: 丘成棟; pinyin: Qiū Chéngdòng; born 1952) is a Chinese-American mathematician. He is a Distinguished Professor Emeritus at the University of Illinois at Chicago, and currently teaches at Tsinghua University. He is a Fellow of the Institute of Electrical and Electronics Engineers and the American Mathematical Society.
Shing-Toung Yau was born in 1952 in British Hong Kong, with his ancestral home in Jiaoling County, Guangdong, China. He is the younger brother of Fields Medalist Shing-Tung Yau.
After graduating from the Chinese University of Hong Kong, he studied mathematics at the State University of New York at Stony Brook, where he earned his M.A. in 1974 and Ph.D. in 1976.
He was a member of Princeton University's Institute for Advanced Study from 1976 to 1977 and from 1981 to 1982, and was a Benjamin Pierce Assistant Professor at Harvard University from 1977 to 1980. He subsequently taught at the University of Illinois at Chicago for more than 30 years. He was named the UIC Distinguished Professor in 2005.
From 2002 to 2011, Yau also served as the Zi-Jiang Professor at East China Normal University in Shanghai, as well as Director of the university's Institute of Mathematics. After retiring from UIC in 2012, he joined Tsinghua University as a full-time professor.