John Lewis Petit (1736–1780) was an English physician and Fellow of the Royal Society.
The son of John Petit of Little Aston, Staffordshire, he was born in the parish of Shenstone, Staffordshire.
Admitted in 1752 to Queens' College, Cambridge, he graduated B.A.
[1][2] Petit was elected fellow of the College of Physicians in 1767, was Gulstonian lecturer in 1768, censor in that year, 1774, and 1777; and was elected physician to St. Bartholomew's Hospital on the death of Anthony Askew in 1774.
[1] Petit married Katherine Laetitia Serces in 1769.