Ralph Abercromby, 2nd Baron Dunfermline

Ralph Abercromby, 2nd Baron Dunfermline KCB FRSE (6 April 1803 – 2 July 1868) was a Scottish nobleman and diplomat, styled The Honourable from 1839 to 1858.

He entered the Diplomatic Service, becoming an attaché at Frankfurt in 1821 and a précis writer in the Foreign Office in 1827.

On 18 September 1838 he married Lady Mary Elizabeth Gilberta Elliot-Murray-Kynynmound, daughter of the Earl of Minto.

Upon his father's death in 1858 he succeeded to the Barony, as 2nd Baron Dunfermline, and lived at the family home Colinton House, Midlothian (now in Edinburgh).

In 1863 he was elected a Fellow of the Royal Society of Edinburgh, upon the nomination of Sir John M'Neill.