Lieutenant-Colonel Sir Francis D'Oyly KCB (8 November 1776 – 18 June 1815) was a British Army officer.

[2] Commissioned into the 1st Regiment of Guards, D'Oyly served with them during the 1799 Anglo-Russian expedition to the Netherlands in 1799.

[3] On 6 October 1812, he was given command of a company in the Guards as a brevet major after the death of Lt-Col.

[4] He then served under the Duke of Wellington in the British Army's campaign in the Spanish Peninsula and France,[2] after which he was made a KCB.

[5][6] He again served under Wellington during the Hundred Days and was killed at the battle of Waterloo.