Earl of Iddesleigh (/ˈɪdzliː/ IDZ-lee),[2][3] in the County of Devon, is a title in the Peerage of the United Kingdom.

He served as President of the Board of Trade, Secretary of State for India, Chancellor of the Exchequer, First Lord of the Treasury and Foreign Secretary and was Joint Leader of the Conservative Party from 1881 to 1885.

He notably served as Chairman of the Board of Inland Revenue, and a Justice of the peace and deputy lieutenant in Devonshire.

His eldest son, the fourth Earl, served as a Deputy Lieutenant of Devon.

The present holder of the peerages is John Stafford Northcote, 5th Earl of Iddesleigh (born 15 February 1957).

The only son of the 4th Earl and his wife Maria Luisa Alvarez-Builla y Urquijo, Condesa del Real Agrado, he was educated at Downside School and the Royal Agricultural College and was styled as Viscount St Cyres between 1970 and 2004.