Ronald Ruthven Leslie-Melville, 11th Earl of Leven and 10th Earl of Melville KT PC DL (19 December 1835 - 21 August 1906) was a Scottish nobleman.
The son of the John Thornton Leslie-Melville, 9th Earl of Leven and his second wife, Sophia, daughter of Henry Thornton MP, he was educated at Eton and at Christ Church, Oxford. He succeeded his half-brother Alexander Leslie-Melville, 10th Earl of Leven in 1889.
He was a Director of the Peninsular and Oriental Steam Navigation Company and of the Bank of England.
He was a Scottish representative peer from 1892 until his death, Keeper of the Privy Seal of Scotland from 1900 until his death, and Lord High Commissioner to the General Assembly of the Church of Scotland (1898-1905). Director of the Bank of England 1884-94. He was Deputy Lieutenant for the City of London. He was appointed a Privy Counsellor in 1902 and a Knight of the Thistle in 1905.
In 1885 he married Hon. Emma Selina Portman, eldest daughter of Henry Portman, 2nd Viscount Portman; they had children:
| Political offices | ||
|---|---|---|
| Preceded by Schomberg Henry Kerr |
Keeper of the Privy Seal of Scotland 1900–1907 |
Succeeded by Gavin Campbell |
| Peerage of Scotland | ||
| Preceded by Alexander Leslie-Melville |
Earl of Leven Earl of Melville 1889–1906 |
Succeeded by John David Melville |