Earl of Egremont was a title in the Peerage of Great Britain. It was created in 1749, along with the subsidiary title Baron Cockermouth, in Cumberland, for Algernon Seymour, 7th Duke of Somerset, with remainder to his nephews Sir Charles Wyndham, 4th Baronet, of Orchard Wyndham, and Percy Wyndham-O'Brien. The Duke had previously inherited the Percy estates, including the lands of Egremont in Cumberland, from his mother Lady Elizabeth Percy, daughter and heiress of Joceline Percy, 11th Earl of Northumberland. In 1750 Sir Charles Wyndham succeeded according to the special remainder as 2nd Earl of Egremont on the death of his uncle. His younger brother Percy Wyndham-O'Brien was created Earl of Thomond in 1756.