Colonel Sir Alastair Frederick Down OBE MC TD (23 July 1914 – 22 October 2004) was a Scottish army officer, accountant, and oilman.

Down joined the Anglo-Iranian Oil Company in 1938 in London and was posted to Mandatory Palestine.

After the outbreak of World War II, in 1940 Down was placed on active service, seconded to the Argyll and Sutherland Highlanders, and ordered to report to the regiment in Egypt.

Down commanded a platoon in the Battle of Sidi Barrani in December 1940 and lost his right eye in the engagement.

Down left British Petroleum in 1975 and was appointed chairman of Burmah Oil, which he rescued from the verge of bankruptcy.