| Honorific Prefix: | The Right Honourable |
| The Lord Grantley | |
| Birth Date: | 1 October 1855 |
| Death Place: | London |
| Alma Mater: | Highgate School Harrow School University of Dresden |
| Spouse: | (1) Katharine Buckner Norton, née McVickar (2) Alice Jones |
| Nationality: | British |
John Richard Brinsley Norton, 5th Baron Grantley, FSA, FRNS (1 October 1855 – 5 August 1943), was a British peer from an English landowning family. He became known also as an antiquary and a numismatist.
Norton was born in Florence, Italy, the son of Thomas Norton, 4th Baron Grantley and his wife, Maria, née Federigo, and a grandson of Caroline Norton, the writer. He was educated at Highgate School from 1867 until 1869,[1] and then at Harrow School and the University of Dresden. He inherited his father's title in 1877 and was at some time a captain in the Middlesex Yeomanry.
Grantley was a Fellow of the Society of Antiquaries of London, the Royal Numismatic Society and the British Numismatic Society.[2] His country seats were Weeke Manor in Winchester and Markenfield Hall in Ripon. He also owned Elton Manor in Nottinghamshire for a time, but seems hardly to have lived there.[3] He purchased the Red Rice estate in 1913.
In 1879, Grantley married Katharine Buckner Norton, née McVickar (died 1897), the former wife of his cousin, Charles Grantley Campbell Norton. She was the daughter of Commodore William Henry McVickar, US Navy, of New York. They had six children.
He married secondly, in 1899, Alice Jones (died 1942), the illegitimate daughter of Thomas Jones, 7th Viscount Ranelagh.
On Grantley's death in 1943, his titles passed to his only surviving son, Richard Henry Brinsley Norton (6th Lord Grantley), a film-maker and husband of Jean Mary Kinloch.
| Escutcheon: | Azure a Maunch Ermine surmounted by a Bend Gules |
| Crest: | A Moor's Head affrontée couped at the shoulders wreathed round the temples with Laurel proper and around the neck a Torse Argent and Azure |
| Supporters: | Dexter: a Lion; Sinister: a Griffin, both Argent and ducally gorged Or and pendent from the coronets by a Ribbon Gules a Shield of the Arms of Norton |
| Motto: | Avi Numerantur Avorum (I follow a long line of ancestry)[4] |