{{short description|Title in the Peerage of Great Britain}} {{redirect|Lord Chatham|the holder of that title who served as British prime minister|William Pitt, 1st Earl of Chatham|the island in Ecuador|San Cristóbal Island}} {{Use dmy dates|date=April 2022}} thumb|200px|William Pitt (the Elder), 1st Earl of Chatham '''Earl of Chatham''', of Chatham in the County of Kent, was a title in the Peerage of Great Britain. It was created in 1766 for William Pitt the Elder on his appointment as Lord Privy Seal, along with the subsidiary title of '''Viscount Pitt''', of Burton Pynsent in the County of Somerset, also in the Peerage of Great Britain.
The first earl's wife, the former Lady Hester Grenville, daughter of the 1st Countess Temple, had earlier been created the '''Baroness Chatham''', of Chatham in the County of Kent, also in the Peerage of Great Britain, in 1761, as at that stage her husband had wished to remain a member of the House of Commons.
Their second son was William Pitt the Younger, who became the country's youngest Prime Minister in 1783, at the age of 24.
Their eldest son, John Pitt, inherited the earldom and viscountcy in 1778 and the barony in 1803. Upon his death in 1835, all three titles became extinct.
==Barons Chatham (1761)== thumb|150px|Arms of William Pitt
The second creation of this title came in 1761 in favour of Lady Hester Pitt; the first creation was for John Campbell, 2nd Duke of Argyll and hence the Duke of Argyll.
*Hester Pitt, 1st Baroness Chatham (1720–1803) *John Pitt, 2nd Earl of Chatham, 2nd Baron Chatham (1756–1835)
==Earls of Chatham (1766)== *William Pitt, 1st Earl of Chatham (1708–1778) *John Pitt, 2nd Earl of Chatham (1756–1835)
== Family tree == {{Viscount Cobham family tree}}
==Arms== {{Emblem table | image = Coat of arms of William Pitt the Elder. 1st Earl of Chatham.svg | imagesize = 250px | crest = A stork proper beaked and membered or, resting the dexter claw on an anchor erect cabled or. | escutcheon = Sable, a fess chequy argent and azure between three bezants. | supporters = Dexter, A lion rampant guardant proper charged on the shoulder with an acorn or, slipped and leaved vert. Sinister, A buck proper attired, collared and chained or. | motto = ''Benigno numine'' (By Divine Providence).<ref>{{cite book |title=Burke's General Armory |year=1884 |pages=806 |URL=https://archive.org/details/generalarmoryofe00burk/page/806/mode/1up}}</ref> }} These arms form the basis for those of Pittsburgh, Pennsylvania, and the University of Pittsburgh.
==See also== *Earl of Londonderry (1726 creation) *Baron Camelford
== References == {{Reflist}}
==External links== *{{Rayment|external links=y|date=February 2012}}
{{DEFAULTSORT:Chatham}} Category:1766 establishments in Great Britain Category:1835 disestablishments in the United Kingdom Category:Extinct earldoms in the Peerage of Great Britain Category:Noble titles created in 1766 Category:William Pitt, 1st Earl of Chatham Chatham