Aba Bayefsky (April 7, 1923 - May 5, 2001) was a Canadian artist and teacher.

He was born in Toronto, the second son of a Russian-born father and a Scottish-born mother. During his teens, he attended classes at the Children’s Art Centre of the Art Gallery of Ontario, where, he was encouraged by such artists as Arthur Lismer, Erma Sutcliffe , Dorothy Medhurst and A.Y. Jackson.

He enlisted in the RCAF in October, 1942 and was made a Flight-Lieutenant. He was appointed an official war artist in December, 1944, assigned to depict airborne operations over north-west Europe.

After the war, he was an instructor at the Ontario College of Art. In 1958, he joined the Royal Canadian Academy of Arts .

In 1979 he was made a Member of the Order of Canada.