Sir Patrick Heron Watson (5 January 1832 – 21 December 1907) was an eminent 19th-century Scottish surgeon and pioneer of anaesthetic development. He was associated with a number of surgical innovations including excision of the knee joint, excision of the thyroid and excision of the larynx for malignant disease. He was President of the Royal College of Surgeons of Edinburgh on two occasions, an unusual honour, and was the first President of the Edinburgh Dental Hospital. He was a great advocate of women training in medicine and surgery and did much to advance that cause.