John Scott, 2nd Earl of Eldon (10 December 1805 – 18 September 1854) was a British peer and Tory politician.
Eldon was the only child of John Scott (1774–1805), MP for Boroughbridge, the only son of Lord Chancellor John Scott, 1st Earl of Eldon. His father died when he was only two weeks old. His mother was Henrietta Elizabeth, daughter of Sir Matthew White Ridley, 2nd Baronet. He was educated at Winchester and New College, Oxford.
Eldon sat as Member of Parliament for Truro from 1828 to 1831. In 1838 he succeeded his grandfather in the earldom and entered the House of Lords.
Lord Eldon married Louisa, daughter of Charles Duncombe, 1st Baron Feversham, in 1831. They had one son and six daughters. She died in November 1852. Lord Eldon survived her by two years and died in September 1854, aged 48. He was succeeded in the earldom by his only son, John.