The Honourable Sylvia Olga Fedoruk, O.C., S.O.M., D.Sc., LL.D., D.Hum.L., (born May 5, 1927) is a Canadian scientist and former Lieutenant Governor of Saskatchewan.

Born in Canora, Saskatchewan , of Ukrainian immigrants, she received a Bachelor of Arts degree in physics at the University of Saskatchewan, in 1949, and a M.A. in 1951.

She was the chief medical physicist at the Saskatoon Cancer Clinic and director of physics services at the Saskatchewan Cancer Clinic. She was a professor of oncology and associate member in physics at the University of Saskatchewan. She was involved in the development of the world’s first Cobalt 60 unit and one of the first nuclear medicine scanning machines

She was the first woman member of the Atomic Energy Control Board of Canada .

From 1986 to 1989 she was chancellor of the University of Saskatchewan.

She is a past president (1971 to 1972) of the Canadian Ladies Curling Association. In 1986, she was inducted into the Canadian Curling Hall of Fame , as a builder, and was awarded the Saskatchewan Order of Merit.

In 1987, she was made an officer of the Order of Canada.

From 1988 to 1994, she was lieutenant governor of Saskatchewan.