Sir Oliver St John (; c. 1598 – 31 December 1673) was an English barrister, judge and politician who sat in the House of Commons from 1640-53. He supported the Parliamentary cause in the English Civil War.
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Early life
St John was the son of Oliver St John (of Cayshoe) and his wife Sarah Bulkeley, daughter of Edward Bulkeley of Odell, Bedfordshire and sister of Peter Bulkeley. St John's sister, Elizabeth St John (1605-1677), married Revernd Samuel Whiting (1597-1679) and emigrated to the Massachusetts Bay Colony in Boston in 1636. St John's uncle, Reverend Peter Bulkeley (1583-1689), was also an influential Puritan who left England to live in Massachusetts Bay Colony having fallen out in 1633 with King Charles I, primarily over the King's reissuing of the Declaration of Sports.
St John was one of the leaders of the Parliamentary opposition to King Charles I of England.




