Major-General Sir George Charles d'Aguilar, KCB (Chinese: 德忌笠; Sidney Lau: Dak1 Gei6 Lap1 or Chinese: 德己立; Sidney Lau: Dak1 Gei2 Laap6); January 1784 – 21 May 1855), was a British Army officer who served as Lieutenant Governor of Hong Kong (1843–1848).

He entered the army in 1799 as an ensign with the 86th (Royal County Down) Regiment of Foot which was stationed in India.

[2] He was subsequently on the staff as assistant adjutant-general in Sicily, where he was sent by Lord William Bentinck on a military mission to the court of Ali Pasha at Ioannina and Constantinople.

[4] Altogether d'Aguilar served for twenty six years on the general staff, during eight of which he was assistant adjutant-general at the Horse Guards, principally under Prince Frederick, Duke of York and Albany, and for twelve years assistant adjutant-general of the army in Ireland.

[3] As Commander of the British troops in China, D'Aguilar arrived in Hong Kong aboard HMS Castor on 27 December 1843.