Sir Henry Strachey, 1st Baronet (23 May 1736 – 3 January 1810) was a British civil servant and politician who sat in the House of Commons for 39 years from 1768 to 1807.
Strachey was the eldest son of Henry Strachey, of Sutton Court, Somerset, and his first wife Helen, daughter of Robert Clerk, a Scottish physician. His grandfather was the geologist John Strachey and his great-grandfather John Strachey was a friend of John Locke. 
He was appointed private secretary to Lord Clive in India in 1762, a position he held until 1768, when he was returned to Parliament for Pontefract. He sat for this constituency until 1774, and later represented Bishop's Castle from 1774 to 1778 and from 1780 to 1802, Saltash from 1774 to 1780 and East Grinstead from 1802 to 1807.  Strachey was Clerk of the Deliveries of the Ordnance from 1778 to 1780 and Principal Storekeeper of the Ordnance from October 1780 to May 1782 and after a hiatus again in 1783–84. He served under the Marquess of Rockingham as Joint Secretary to the Treasury in 1782 and under the Earl of Shelburne as Joint Under-Secretary of State for the Home Department from 1782 to 1783. 
He took part in the peace negotiations with the American colonies in Paris in 1783 with Richard Oswald representing the British and John Jay, Johns Adams and Benjamin Franklin representing the Americans. This resulted in the Treaty of Paris (1783). He later served as Master of the Household between 1794 and 1810.
In 1801, he was created a Baronet, of Sutton Court in the County of Somerset.  
Strachey died in January 1810, aged 72, and was succeeded in the baronetcy by his eldest son Henry.  His memorial in Chew Magna was created by John Bacon. 
In 1770 Strachey married Jane, only daughter of Capt. John Kelsall (1702-1787), the widow of Capt. Thomas Latham.  They had three sons and one daughter. His second son Edward Strachey was the father of John Strachey and Lieutenant-General Sir Richard Strachey and the grandfather of Lytton Strachey, James Strachey, Oliver Strachey and Dorothy Bussy. Other descendants of Strachey include the Liberal politician Edward Strachey, 1st Baron Strachie, the journalist John Strachey and the Labour politician John Strachey. Lady Strachey died on 12 February 1824. 
Thomas Pelham, 2nd Earl of Chichester PC, PC (Ire), FRS, styled The Honourable Thomas Pelham from 1768 until 1783, The Right Honourable Thomas Pelham from 1783 to 1801, and then known as Lord Pelham until 1805, was a British Whig politician. He notably held office as Home Secretary under Henry Addington from 1801 to 1803.
John Dunning, 1st Baron Ashburton, of Spitchwick the parish of Widecombe-in-the-Moor, Devon, was an English lawyer and politician, born in Ashburton in Devon, who served as Solicitor-General from 1768. He was first noticed in English politics when he wrote a notice in 1762 defending the British East India Company merchants against their Dutch rivals. He was a member of parliament from 1768 onward. His career in the House of Commons is best known for his motion in 1780 that "the influence of the crown has increased, is increasing, and ought to be diminished". He was created Baron Ashburton in 1782.
Strachey is a surname. Notable people with the surname include:
William Eden, 1st Baron Auckland, PC (Ire), FRS was a British diplomat and politician who sat in the House of Commons from 1774 to 1793.
Henry Bayly-Paget, 1st Earl of Uxbridge, known as Henry Bayly until 1769 and as Lord Paget between 1769 and 1784, was a British peer.
George Legge, 3rd Earl of Dartmouth KG, PC, FRS, styled Viscount Lewisham until 1801, was a British politician who sat in the House of Commons from 1778 to 1784.
The Strachey baronetcy, of Sutton Court in the County of Somerset, England, is a title in the Baronetage of the United Kingdom. This family was originally seated at Walden, Essex, where William Strachey was living under the rule of Edward VI. Later they moved to Surrey and at last settled at Sutton Court, Somerset. The title was created on 15 June 1801 for the politician and civil servant Henry Strachey. Sir Henry was private secretary to Lord Clive during his last expedition to India in 1764. He also took part in negotiations for peace with North America where he assisted the kings commissioners at Paris. He died in 1809 and was succeeded by his eldest son Henry, the second Baronet Strachey. His great-grandson, the fourth Baronet, was a Liberal politician. On 3 November 1911, he was created Baron Strachie, of Sutton Court in the County of Somerset, in the Peerage of the United Kingdom. He later served as Paymaster-General. The peerage became extinct on the death of his son, the second Baron, in 1973. The late Baron was succeeded in the baronetcy by his first cousin once removed, the sixth Baronet. He was the son of John Strachey, son and namesake of John Strachey, second son of the third Baronet. Strachey died January 2014 and did not use his title. Also, he had not successfully proven his succession and was therefore not on the Official Roll of the Baronetage, with the baronetcy considered dormant.
The Principal Storekeeper of the Ordnance was a subordinate of the Master-General of the Ordnance and a member of the English Board of Ordnance from its constitution in 1597. He was responsible for the care and maintenance of ordnance stores. The office was abolished in 1855.
Sir John Aubrey, 6th Baronet was a British Tory politician. In 1786, he succeeded to his father's baronetcy.
Sir Matthew White Ridley, 2nd Baronet, was a Northumbrian landowner and politician who sat in the House of Commons between 1768 and 1812.
Charles Sloane Cadogan, 1st Earl Cadogan was a British peer and Whig politician.
Henry Fane was a British politician who sat in the House of Commons for 30 years between 1772 and 1802.
Sir Richard Sutton, 1st Baronet, of Norwood Park in Nottinghamshire, was a British politician who sat in the House of Commons from 1768 to 1796.
John Stewart, 7th Earl of Galloway was a Scottish peer, styled Viscount Garlies from 1747 until 1773, who became the 7th Earl of Galloway in 1773 and who served as a Member of Parliament from 1761 to 1773.
Sir John Frederick, 5th Baronet (1750–1825), was a British politician who sat in the House of Commons between 1774 and 1807.
Benjamin Langlois (1727–1802) was a British administrator and politician who sat in the House of Commons between 1768 and 1780.
John Strachey (1737–1818) was Archdeacon of Suffolk from 5 March 1781 until his death on 17 December 1818.