Oliver Montagu (c.1655 – 25 December 1689) was an English lawyer and Member of Parliament.
[1] Together with his twin brother, John, he was initially educated at Huntingdon Grammar School, from where they were summoned to meet Samuel Pepys (a family friend): The two twins were sent for from schoole, at Mr. Taylor's, to come to see me, and I took them into the garden, and there, in one of the summer-houses, did examine them, and do find them so well advanced in their learning, that I was amazed at it: they repeating a whole ode without book out of Horace, and did give me a very good account of any thing almost, and did make me very readily very good Latin, and did give me good account of their Greek grammar, beyond all possible expectation; and so grave and manly as I never saw, I confess, nor could have believed; so that they will be fit to go to Cambridge in two years at most.
[2]The boys transferred to Westminster School and thence to Trinity College, Cambridge, where Montagu was admitted as a Fellow commoner on 12 April 1672, and awarded an MA in 1673.
[3] Montagu was admitted to the Middle Temple in 1674, called to the bar in 1681, became a bencher in 1684 and a King's Counsel the following year.
Following the Glorious Revolution, he accepted the new regime and was reappointed as a KC, but died on 25 December 1689.