Ryōji Noyori (born September 3, 1938) is a Japanese chemist. He won the Nobel Prize in Chemistry in 2001. Noyori shared half of the prize with William S. Knowles for the study of chirally catalyzed hydrogenations; the second half of the Prize went to K. Barry Sharpless for his study in chirally catalyzed oxidation reactions.

After postdoctoral work with Elias J. Corey at Harvard he returned to Nagoya, becoming a full professor in 1972. He is still based at Nagoya, though he is also now president of RIKEN, a multi-site national research initiative with an annual budget of $800 million.
In 2000 Noyori became Honorary Doctor at the University of Rennes 1 where he taught in 1995, and in 2005, he became Honorary Doctor at Technical University of Munich and RWTH Aachen University, Germany.
Noyori is currently a chairman of the Education Rebuilding Council, which was set up by Japan's PM Shinzō Abe after he came to power in 2006.