Samuel Foart Simmons , FRS (17 March 1750 – 23 April 1813) was a British physician.
He was elected a Fellow of the Royal Society in 1779 and delivered their Croonian Lecture in 1784 on the Irritability of the Muscular Fibres.
In 1804 he was appointed one of the mentally deranged King George III's physicians extraordinary.
He resigned his position at St Luke’s hospital in 1811, but was retained as a consulting physician.
He died at his house in Poland Street, London and was buried in the churchyard of St Clement’s, Sandwich.