George Augustus Frederick Charles Holroyd, 2nd Earl of Sheffield FRS (16 March 1802 – 5 April 1876), styled Viscount Pevensey from 1816 to 1821, was a British Conservative politician.
He was later able to take a seat in the House of Lords in right of his junior title of Baron Sheffield, which was in the Peerage of the United Kingdom.
He served as a Lord-in-waiting (government whip in the House of Lords) from 1858 to 1859 in the Conservative administration of the Earl of Derby.
John's second wife was Lady Lucy Pelham, 1763–1797,a daughter of the Earl of Chichester, who died without issue.
Lord Sheffield married Lady Harriet, daughter of Henry Lascelles, 2nd Earl of Harewood, in 1825.