Robert Sempill (1672 – 11 November 1737), styled Lord Sempill from 1712, was a Scottish Jacobite and soldier in French service.
Sempill was born at Castle Semple, Scotland, the son of Hon.
[1] Being a Roman Catholic, he was sent to be educated in France and by 1688 was an ensign in the French royal Scottish Guards.
On 11 May 1712, Sempill was the subject of a "declaration of nobility" by the exiled James Francis Edward Stuart, which recognised Semphill as the legitimate heir of his Lord Semphill ancestors and thereby created him Lord Sempill of Dykehead in the Jacobite peerage.
He was succeeded by his eldest son, Francis Sempill, who became a leading Jacobite agent in Paris.