Simon Luttrell, 1st Earl of Carhampton (1713 – 14 January 1787) was an Anglo-Irish politician and nobleman.
He was the second son of Col. Henry Luttrell, of Luttrellstown (whose family had held Luttrellstown since the land there had been granted to Sir Geoffrey de Luterel in about 1210 by King John of England). He served as a Member of Parliament in the House of Commons of Great Britain for four constituencies: Mitchell (1755–61), Wigan (1761–68), Weobley (1768–74) and (1774–80).
On 13 October 1768 he was created Baron Irnham of Luttrellstown in the Peerage of Ireland. As his title was an Irish peerage, he was able to keep his seat in the British House of Commons. He was elevated to the title of Viscount Carhampton on 9 January 1781 and was made Earl of Carhampton on 23 June 1785. He lived at Four Oaks Hall, Four Oaks, Sutton Coldfield from 1751 to 1766.
He married Judith Maria Lawes in 1737, by whom he had eight children:
His rakish behaviour earned him the nickname "King of Hell", "Hell" being a district of Dublin notorious for its brothels. He is reputed to have started the courtesan Mary Nesbitt in her career by seducing her. He had a natural son, Henry Luttrell, possibly by a gardener's daughter. He became known in London as a conversationalist and sometime writer.