Archibald Alexander John Stanley Acheson, 6th Earl of Gosford, OBE, FRSA (14 January 1911 – 17 February 1966), styled Viscount Acheson until 1954, was a British peer, politician, and a Royal Air Force officer.

Archibald Acheson was the elder son of Archibald Acheson, 5th Earl of Gosford^[1] and Mildred, daughter of John Ridegely Carter of Baltimore, a banker and former United States Minister to Romania.^[2]

Acheson was educated at Harrow School, where he was Inter-Public Schools Athletics Champion for the 880 yards in 1929, and Trinity College, Cambridge, gaining an Master of Arts. At Cambridge he was a member of the Pitt Club, the Hawks' Club, the Alverstone Club and the Achilles Club.

Acheson was commissioned into the Royal Air Force in 1932 and served as Assistant Air Attaché at the British Embassy in Paris from 1938–40. During the Second World War he commanded No. 613 Squadron AAF from 1941–42 and later No. 32 Wing RAF. He was made an Officer of the Order of the British Empire in 1946, and was also awarded the United States Bronze Star Medal and made an Officer of the French Legion of Honour. From 1946–48 he was Chief Instructor of the Cambridge University Air Squadron.

On 13 December 1935, he was married to Francesca Cagiati, the eldest daughter of Francesco Cagiati of Boston, Massachusetts.^[5] Before their divorce in 1960, they were the parents of the following children:^[2]

• Lady Francesca Georgiana Caroline Acheson (1940–1991), who married David Wallace Fleming in 1967.^[2]
• Charles David Alexander John Sparrow Acheson, 7th Earl of Gosford (b. 1942), who married Lynette Redmond in 1983.^[2]
• Lady Isabella Augusta Acheson (b. 1950), who married Tevita T'Maka, of Nuku'alofa, Tonga in 1979.^[2]

On 21 September 1960, he married secondly to Cynthia Delius (1911–2015), the widow of Major James Pringle Delius, and a daughter of Captain Henry Cave West.^[6]

Lord Gosford died on 17 February 1966 and was succeeded in his titles and estates by his only son, Charles, who became the 7th Earl of Gosford.^[2]