Sir Thomas Peel Dunhill GCVO CMG (3 December 1876 – 22 December 1957) was an Australian thyroid surgeon and Physician to the Queen of the United Kingdom.
He was born in 1876 near Kerang in the State of Victoria.
He qualified as a pharmacist in 1898, and went on to study medicine at the Clinical School of the Melbourne Hospital graduating in 1903. He worked as a surgeon at St Vincent's Hospital, Melbourne from 1905 to 1920. He enlisted in the Australian Imperial Force during World War I and in July 1918 was appointed consulting surgeon to the Rouen area in France. He was appointed to the Royal Victorian Order and the Order of Saint Michael and Saint George in 1919.
In 1930 he became a fellow of the Royal Australasian College of Surgeons and in 1939 an honorary fellow of the Royal College of Surgeons of England, the first surgeon still in active surgical practice in England to receive this honour.
He then worked at St Bartholomew's Hospital until he retired in 1935. He was knighted in 1933 and appointed surgeon to the Royal Household. He was a pioneer of safe and effective treatment for thyrotoxicosis and in operating on the thyrocardiac.
He established a Thyroid Clinic in 1931, at New End Hospital for the treatment of patients suffering from toxic goitre and myasthenia gravis.