Earl of Dorset is a title that has been created at least four times in the Peerage of England

Peerage of England

The Peerage of England comprises all peerages created in the Kingdom of England before the Act of Union in 1707. In that year, the Peerages of England and Scotland were replaced by one Peerage of Great Britain....

. It was created in 1411 for Thomas Beaufort, who was later created Duke of Exeter

Duke of Exeter

The title Duke of Exeter was created several times in England in the later Middle Ages, when Exeter was the main town of Devon. It was first created for John Holland, the half-brother of King Richard II in 1397. That title was rescinded upon Henry IV's accession to the throne two years later, and...

. The peerages became extinct on his death.

It was next created in 1441 for Edmund Beaufort who was later created first Marquess of Dorset

Marquess of Dorset

The title Marquess of Dorset has been created three times in the Peerage of England. It was first created in 1397 for John Beaufort, 1st Earl of Somerset, but he lost the title two years later. It was then created in 1442 for Edmund Beaufort, 1st Earl of Dorset, who was created Duke of Somerset...

 (1442) then Duke of Somerset

Duke of Somerset

Duke of Somerset is a title in the peerage of England that has been created several times. Derived from Somerset, it is particularly associated with two families; the Beauforts who held the title from the creation of 1448 and the Seymours, from the creation of 1547 and in whose name the title is...

 (1446). These titles were forfeited by the second duke in 1464.

The last creation was in 1604 for Thomas Sackville, 1st Baron Buckhurst

Thomas Sackville, 1st Earl of Dorset

Thomas Sackville, 1st Earl of Dorset was an English statesman, poet, dramatist and Freemason. He was the son of Richard Sackville, a cousin to Anne Boleyn. He was a Member of Parliament and Lord High Treasurer.-Biography:...

. In 1720 the seventh earl was created Duke of Dorset

Duke of Dorset

Duke of Dorset was a title in the Peerage of Great Britain. It was created in 1720 for the politician Lionel Sackville, 7th Earl of Dorset. The Sackville family descended from Sir Richard Sackville. His only surviving son, Thomas Sackville, was a statesman, poet and dramatist and notably served as...

 in the Peerage of Great Britain

Peerage of Great Britain

The Peerage of Great Britain comprises all extant peerages created in the Kingdom of Great Britain after the Act of Union 1707 but before the Act of Union 1800...

. On the death of the fifth duke in 1843 the peerages became extinct.

Earls of Dorset; First creation (1070)

• Osmund de Sees, Earl of Dorset (d. 1099)