Earl of Dorchester

Earl of Dorchester, in the County of Dorset, was a title in the Peerage of Great Britain.

It was created in 1792 for Joseph Damer, 1st Baron Milton.

The second earl was a politician and notably served as Chief Secretary for Ireland between 1794 and 1795.

The title Countess of Dorchester had previously been created in the Peerage of England in 1686, together with the title Baroness Darlington, as life peerages, for Catherine Sedley, a mistress of King James II.

Both titles became extinct on her death in 1717, but her heirs were Earls of Portmore in the Peerage of Scotland.