Shih Yen-shiang (; born 24 March 1950) is a Taiwanese chemist and chemical engineer. He was the Minister of Economic Affairs from 2009 to 2013.
Shih was born in Taichung on March 24, 1950. He graduated from National Taiwan University with a Bachelor of Science (B.S.) in chemistry in 1972, then completed graduate and doctoral studies in the United States. He earned a Master of Science (M.S.) in chemistry from the University of Kansas in 1975, then a second M.S. and his Ph.D. in 1979 from the Massachusetts Institute of Technology (MIT) in chemical engineering.