St Andrew St John, 14th Baron St John of Bletso

St Andrew St John, 14th Baron St John of Bletso PC FRS (22 August 1759 – 15 October 1817) was an English politician who sat in the British House of Commons from 1780 until 1806 when he inherited a peerage.

Biography St John was born at Woodford, Northamptonshire, the son of John St John, 12th Baron St John of Bletso and his wife Susanna Louisa Simond, daughter of Peter Simond. He was educated by the Rev. John Skynner at Easton near Stamford. He was then admitted at Lincoln's Inn on 7 May 1773 and at St John's College, Cambridge in 1776. He was awarded MA in 1779 and was called to the bar on 29 January 1782. He was a personal friend of Charles James Fox, who supported him throughout his political career. He was Under-Secretary of State for Foreign Affairs to Lord North for a short time in 1783 When the regiment became the 2nd Bedfordshire Local Militia in 1808 he continued as its joint-lieutenant-colonel.

St Andrew became the 14th Lord St John of Bletsoe when his brother Henry died in 1805, and so resigned his seat in the Commons. As a peer he accepted a Privy Councillorship in 1806. Also in 1806 he became Captain of the Gentlemen Pensioners until 1807. In 1808 he became a Fellow of the Royal Society and Fellow of the Society of Antiquaries.

St John married Louisa Boughton, 30 years his junior at St George Hanover Square on 16 July 1807. She was the daughter of Sir Charles William Rouse-Boughton, 9th Baronet and Catherine Pearce. St John was then nearly 50 and had a long parliamentary career behind him in which he would have been on the opposite side in most cases to Louisa's father. They lived at Melchbourne Park, Bedfordshire, and had two children, St Andrew and Louisa Barbara (born posthumously) who married Norman MacLeod, 25th Chief of MacLeod. Lord St John died at the age of 58, leaving Louisa a widow with a young family. She married again to John Vaughan on 11 August 1828. They had a son, Rev. Charles Lyndhurst Vaughan, and a daughter, Emily, who married Sir Charles Isham, 10th Baronet.