John Wishart (May 27, 1850 – November 6, 1926) was a Canadian surgeon and pioneer medical educator.

His resignation after 27 years as Professor of Clinical Surgery may have been due to Flexner's negative comments about the school.

As a young surgeon in 1874, he assisted Abraham Groves in one of the first operations to use modern aseptic technique.

[4] Wishart published early articles regarding several surgical procedures, including nephrectomy[5] and strangulated inguinal hernia.

Despite being Presbyterian, he had an excellent relationship with the Catholic Sisters of St. Joseph who ran the hospital.