David Erskine, 9th Earl of Buchan, 4th Lord Cardross, PC (3 January 1672 – 14 October 1745) was a Scottish peer.
He was the son of Henry Erskine, 3rd Lord Cardross, by Catherine, daughter of Sir James Stewart of Kirkhill.
Due to his opposition of the 1707 Act of Union, he lost prominence and was removed from his several offices of state.
[2] After the aforementioned rising, he sat in the House of Lords as a Scottish representative peer between 1715 and 1734.
of Hurst, Berkshire, and had issue, including Henry David Erskine, 10th Earl of Buchan.