John Henry Smyth (20 March 1780 – 20 October 1822) was a Whig member of Parliament for Cambridge University from 9 June 1812 until his death.
He was one of four sons and two daughters born to Lady Georgiana FitzRoy (1757–1799) and John Smyth (1748–1811), who served as MP of Pontefract from 1783 to 1807.
[3] Before he was elected to Parliament, Smyth was Under-Secretary of State for the Home Department in Pitt's government at his father's request, from July 1804 to February 1806.
[3][4] He was unwell during his last term in office and lived in Hastings for several months in the hope of recovering his health, but he died there in October 1822.
They had two sons and four daughters:[2] He was buried in the same vault as his first wife Sarah, in the church of the parish of St. Peter at Warmfield in Kirkthorp, where they were married.