John Calcraft the Younger (16 October 1765 – 11 September 1831), of Rempstone in Dorset and Ingress in Kent, was an English landowner and Member of Parliament.
The property included control of the pocket borough of Wareham in Dorset, and while still three months short of coming of age he was returned as its Member of Parliament (MP) in 1786.
From 1800 until 1828, Calcraft was a Whig, and served briefly as a clerk of the ordnance (1806–1807) when the party held power under Lord Grenville.
However, in 1828 he accepted office as Paymaster of the Forces in the Duke of Wellington's Tory administration, and was raised to the Privy Council; but he broke with the Tories over parliamentary reform and returned to the Whigs in March 1831, voting for the Reform Bill in the crucial division on the second reading when it passed by a single vote.
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