He was educated at Peterhouse, Cambridge, where he was elected fellow in 1761, having previously been Second Wrangler at Cambridge in 1757. He was a man of independent judgement, and he and his wife Ann warmly supported the movement of 1771 for abolishing university and clerical subscription to the Thirty-nine Articles. In his lectures on the Greek Testament he is said to have expressed Socinian views. In 1775 he resigned his Suffolk church livings, and two years afterwards graduated M.D. at St Andrews. He practised medicine in London and was elected a fellow of the Royal Society in 1779. He and Ann continued to be involved in political reform.
Gascoigne, John. “Jebb, John (1736–1786).” Oxford Dictionary of National Biography. Ed. H. C. G. Matthew and Brian Harrison. Oxford: OUP, 2004. Online ed. Ed. Lawrence Goldman. October 2005. 7 May 2007.
Page, Anthony. John Jebb and the Enlightenment Origins of British Radicalism. Praeger Publishers, 2003. ISBN 0-275-97775-7