Sir Prescott Gardner Hewett, 1st Baronet, FRCS (3 July 1812 – 19 June 1891) was a British surgeon, and the son of a Yorkshire country gentleman.
Hewett lived for some years in early life in Paris, and started on a career as an artist, but abandoned it for surgery.
He entered Saint George's Hospital, London (where his half-brother, Dr Cornwallis Hewett, was a physician from 1825 to 1833), becoming demonstrator of anatomy and curator of the museum.
He was the pupil and intimate friend of Sir Benjamin Collins Brodie, and helped the latter in much of his work.
Through his older brothers, he was uncle to Vice-Admiral Sir William Hewett VC, KCB, KCSI and Rev.