His son, the thirteenth Lord, served as a Scottish Representative Peer between 1833 and 1834 and 1847 and 1849 and was also Governor of Bombay and of Madras. In 1859 he was created Baron Elphinstone, of Elphinstone in the County of Stirling, in the Peerage of the United Kingdom. However, this title became extinct on his death in 1860 while he was succeeded in the lordship by his first cousin, the fourteenth Lord. He was the son of Admiral the Hon. Charles Elphinstone-Fleming, second son of the eleventh Lord.
When he died the following year this line of the family also failed and he was succeeded by his second cousin, the fifteenth Lord. He was the grandson of the Hon. William Elphinstone, third son of the tenth Lord. Lord Elphinstone sat in the House of Lords as a Scottish Representative Peer from 1867 to 1885 and served as a Lord-in-Waiting (government whip in the House of Lords) in the Conservative administrations of Benjamin Disraeli and Lord Salisbury. In 1885 he was created Baron Elphinstone, of Elphinstone in the County of Haddington, in the Peerage of the United Kingdom. The Lords Elphinstone sat in the House of Lords in right of this title until the passing of the House of Lords Act 1999 removed the automatic right of hereditary peers to sit in the upper chamber of Parliament.
He was succeeded by his son, the sixteenth Lord. In 1910 he married Lady Mary Bowes-Lyon, second daughter of Claude Bowes-Lyon, 14th Earl of Strathmore and Kinghorne, and elder sister of Lady Elizabeth Bowes-Lyon, wife of King George VI and mother of Queen Elizabeth II. He was succeeded by his son, the seventeenth Lord, and on his death the titles passed to his nephew, the eighteenth Lord. As of 2007 the titles are held by the latter's son, the nineteenth Lord, who succeeded in 1994 at the age of fourteen. He is Chief of Clan Elphinstone. Lord Elphinstone is a third cousin of Prince William of Wales.
Other members of the Elphinstone family include James Elphinstone, 1st Lord Balmerinoch, younger son of the third Lord Elphinstone. Lord Balmerinoch's younger son was James Elphinstone, 1st Lord Coupar. Another member was George Keith Elphinstone, 1st Viscount Keith. He was the fifth son of the tenth Lord Elphinstone. Lord Keith's daughter Margaret Keith, 2nd Baroness Keith (who had succeeded to the two baronies of Keith held by her father according to special remainders in the letters patent) inherited the Lordship of Nairne in 1837, a title which is now held by the Viscount Mersey.
John Elphinstone, 17th Lord Elphinstone and 3rd Baron Elphinstone (1914-1975). WW2 POW 12.6.40 - 13.4.45. "Prominente" prisoner at Colditz (Oflag IV-C) 10.11.44 - 13.4.1945