Francis St John (1634 - 29 July 1705) was an English lawyer and politician who sat in the House of Commons at various times between 1654 and 1698.
He was educated at Oundle School and admitted at Emmanuel College, Cambridge on 21 July 1648 and at Lincoln's Inn on 14 November 1648.
In March 1660 he was commissioner for assessment for Northamptonshire in and was then elected MP for Peterborough in the Convention Parliament, but was there were serious irregularities with the poll and he was unseated in May 1660.
[4] At the Stuart Restoration, St John's father was deprived of civic rights and fled abroad in 1662.
He was a historian and built up a library of history books at his home at Thorpe Hall in Longthorpe, Peterborough.