Henry Guy (1631–1710) was an English politician.
Guy, only son of Henry Guy by Elizabeth, daughter of Francis Wethered of Ashlyns, Great Berkhampstead, was born in that parish on 16 June 1631. The father died in 1640, the mother in 1690, aged 90, when she was buried in the chancel of Tring Church, and her son erected a monument to her memory.
Henry was admitted at the Inner Temple in November 1652, but adopted politics as a profession. He spent some time at Christ Church, Oxford, and was created M.A. in full convocation on 28 September 1663. He afterwards held an excise office in the north of England, and ingratiated himself with the electors of the borough of Hedon in Yorkshire, where he was admitted a free burgess on 2 August 1669.
On 8 March 1670 Guy was elected Member of Parliament for Hedon, and continued to represent it until 1695. He again sat for it from 1702 till 1705, when his parliamentary career ended. In 1693 he erected for Hedon a large town hall. In the House of Commons Guy spoke for the party of the Earl of Sunderland.
His first appointment about the court was to the post of cupbearer to the queen, but he was soon admitted among the boon companions of Charles II. On the resignation in 1675 of Colonel Silas Titus, he became Groom of the Bedchamber, but sold his office by November 1679 to Thomas Neale. In March 1679 he was appointed secretary to the Treasury, and the payments from the public funds passed through his hands until Christmas 1688. John Yonge Akerman edited, from a manuscript in the possession of William Selby Lowndes, for the Camden Society in 1851, as vol. lii. of their publications, details of secret service funds of Charles II and James II from 30 March 1679 to 25 December 1688; it was an account rendered by Guy some time after the accession of William III. In the Correspondence of Henry, Earl of Clarendon (ed. 1828) are particulars of sums paid to him for secret service money for one year, to 7 March 1688.