Admiral Sir Archibald Lucius Douglas, GCB, GCVO (8 February 1842 – 12 March 1913) was a Royal Navy officer of the 19th century.

He was selected to head the second British naval mission to Japan in 1873, and served as a foreign advisor to the fledgling Imperial Japanese Navy until 1875.

[2] Douglas was based at the Imperial Japanese Navy Academy, then located at Tsukiji in Tokyo, where he trained a class of 30 officers.

During his tenure, his advice was called upon for the Taiwan Expedition of 1874, the first major overseas deployment for the Japanese navy.

[3] During the Russo-Turkish War of 1877–1878, Douglas commanded HMS Egeria on an intelligence gathering mission to Petropavlovsk in Kamchatka, which he found to have been abandoned by its Russian garrison.