Lewis Edward Kay, OC FRS FRSC (born September 26, 1961) is a Canadian academic and biochemist known for his research in biochemistry and nuclear magnetic resonance spectroscopy for the studies of the structure and behaviour of proteins.^[1] He is a professor of molecular genetics, biochemistry and chemistry at the University of Toronto and Senior Scientist in Molecular Medicine at The Hospital for Sick Children.^[2]

Kay received a B.Sc. in biochemistry from the University of Alberta in 1983, a Ph.D. in molecular biophysics from Yale University in 1988, and did post-doctoral studies at the National Institutes of Health.^[2] In 2020, he was honoured as an international member of the National Academy of Sciences.^[3]

• 1996 — Merck Frosst Award ^[2]
• 1998 — Canada's "Top 40 under 40" ^[2]
• 1999 — Steacie Prize for Natural Sciences ^[2]
• 2002 — Founders Medal International Society of Magnetic Resonance in Biological Systems ^[2]
• 2002 — Flavelle Medal, Royal Society of Canada^[2]
• 2004 — Günther Laukien Prize^[2]
• 2006 — Elected to the Royal Society of Canada^[2]
• 2008 — Premier's Discovery Award ^[2]
• 2010 — Elected to the Royal Society^[2]
• 2012 — Khorana Prize, Royal Society of Chemistry^[2]
• 2017 — Inducted as an Officer of the Order of Canada^[4]
• 2017 — Gairdner Foundation International Award^[5]
• 2018 — Herzberg Medal of the Natural Sciences and Engineering Research Council of Canada
• 2019 — Doctor of Science honoris causa from The University of British Columbia ^[6]
• 2019 — Nakanishi Prize

Kay is married to biophysicist Julie Forman-Kay, who studies intrinsically disordered proteins.^[7]