General Robert Dalrymple-Horn-Elphinstone (1 March 1718 – 20 April 1794), born Robert Dalrymple-Horn, was a senior British Army commander of the 18th century.
Robert Dalrymple-Horn-Elphinstone was born on 1 March 1718 in the Scottish city of Edinburgh.
He was the son of the judge Hew Dalrymple of Drummore and his wife Ann Horn.
In 1754, he married Mary Elphinstone, a daughter of Sir James Elphinstone, 3rd Baronet.
From 1762 to 1763, Dalrymple-Horn-Elphinstone was only the Colonel of the short-lived 120th Regiment of Foot.