The title was created in 1816 for the prominent naval officerEdward Pellew, 1st Baron Exmouth. He had already been created a baronet in the Baronetage of Great Britain on 18 March 1796 for rescuing the crew of the East IndiamanDutton. After a succession of commands culminating as Commander of the Mediterranean Fleet, he was created Baron Exmouth, of Canonteign in the County of Devon, in the Peerage of the United Kingdom in 1814. He was created a Viscount, with the same designation, for the successful bombardment of Algiers in 1816, which secured the release of the 1,000 Christian slaves in the city. He was succeeded by his eldest son, the second Viscount, who represented Launceston in Parliament. On the death in 1922 of the second Viscount's great-grandson, the fifth Viscount, this line of the family failed. He was succeeded by his 94-year-old first cousin twice removed, the sixth Viscount. He was the son of the Very Reverend and Hon. George Pellew, Dean of Norwich, third son of the first Viscount. Partly due to having become a U.S. citizen, and partly due to his advanced age, the sixth Viscount did not use his title for the brief period he held it, nor did he claim his seat in the House of Lords. Only six months after succeeding to his titles, the sixth Viscount died. He was succeeded by his son, the seventh Viscount, a naturalised U.S. citizen and professor of chemistry. Having succeeded to the peerage, the seventh Viscount returned to England in 1923 and again became a British subject, taking his seat in the House of Lords in 1931. Upon his death without any surviving issue in 1945, this line of the family also failed. The title then passed to the seventh Viscount's second cousin, the eighth Viscount. He was the grandson of the Reverend and Hon. Edward Pellew, fourth son of the first Viscount. His son, the ninth Viscount, married María Luisa de Urquijo y Losada, , a title of Spanish nobility that was created by King Philip IV in 1652. They were succeeded in their respective titles by their son, Paul Pellew, the tenth and current Viscount. The family seat was Canonteign House, near Exeter in Devon.
Barons Exmouth (1814)
Edward Pellew, 1st Baron Exmouth, created Viscount Exmouth in 1816
Viscounts Exmouth (1816)
Edward Pellew, 1st Viscount Exmouth
Pownoll Pellew, 2nd Viscount Exmouth
Edward Pellew, 3rd Viscount Exmouth
Edward Fleetwood John Pellew, 4th Viscount Exmouth
Edward Addington Hargreaves Pellew, 5th Viscount Exmouth
Henry Edward Pellew, 6th Viscount Exmouth
Charles E. Pellew, 7th Viscount Exmouth
Edward Irving Pownoll Pellew, 8th Viscount Exmouth
Pownoll Irving Edward Pellew, 9th Viscount Exmouth
Paul Pellew, 10th Viscount Exmouth
The heir apparent is the present holder's son, the Hon. Edward Francis Pellew.