George John Frederick Sackville, 4th Duke of Dorset (15 November 1793 – 14 February 1815), styled Earl of Middlesex
until 1799, was a British nobleman.

The only son of John Sackville, 3rd Duke of Dorset

John Sackville, 3rd Duke of Dorset

John Frederick Sackville, 3rd Duke of Dorset was the only son of Lord John Philip Sackville, second son of Lionel Sackville, 1st Duke of Dorset. He succeeded to the dukedom in 1769 on the death of his uncle, Charles Sackville, 2nd Duke of Dorset...

 and his wife Arabella, he was educated at Harrow

Harrow School

Harrow School, commonly known simply as "Harrow", is an English independent school for boys situated in the town of Harrow, in north-west London.. The school is of worldwide renown. There is some evidence that there has been a school on the site since 1243 but the Harrow School we know today was...

 and Christ Church, Oxford

Christ Church, Oxford

Christ Church or house of Christ, and thus sometimes known as The House), is one of the largest constituent colleges of the University of Oxford in England...

, receiving a MA

Master of Arts (Oxbridge)

In the Universities of Oxford, Cambridge and Dublin, Bachelors of Arts of these universities are admitted to the degree of Master of Arts or Master in Arts on application after six or seven years' seniority as members of the university .There is no examination or study required for the degree...

 from the latter on 30 June 1813.

He was appointed High Steward

High steward (civic)

High steward is an honorary title bestowed by the councils or charter trustees of certain towns and cities in England. Originally a judicial office with considerable local powers, by the 17th century it had declined to a largely ceremonial role. The title is usually awarded for life, and in some...

 of Stratford-on-Avon, and was commissioned a captain

Captain (British Army and Royal Marines)

Captain is a junior officer rank of the British Army and Royal Marines. It ranks above Lieutenant and below Major and has a NATO ranking code of OF-2. The rank is equivalent to a Lieutenant in the Royal Navy and to a Flight Lieutenant in the Royal Air Force...

 of the local militia on 27 April 1813. On 26 July 1813, he was made lieutenant-colonel commandant of the Sevenoaks and Bromley battalion of militia. However, he died in February 1815, of a fall from his horse while hunting, and was succeeded as duke by his cousin Charles Sackville-Germain

Charles Sackville-Germain, 5th Duke of Dorset

Charles Sackville-Germain, 5th Duke of Dorset KG, PC , known briefly as Charles Sackville before 1770, as Charles Germain between 1770 and 1785, and as The Viscount Sackville between 1785 and 1815, was a British peer, courtier and Tory politician...

. His estate of Knole passed to his sister Elizabeth Sackville-West, Countess De La Warr

Elizabeth Sackville-West, Countess De La Warr

Elizabeth Sackville-West, Countess De La Warr and 1st Baroness Buckhurst was a British peeress.-Biography:...

.