Lieutenant Archibald Buchanan DFC (born October 5, 1892, date of death unknown) was a World War I flying ace credited with seven aerial victories.

Between 31 July and 29 September, he scored five more wins over enemy fighter planes; his final summary was victory over five Fokker D.VIIs, a Pfalz D.III, and a balloon.

[2] On 30 October, Buchanan was shot down by Michael Hutterer of Jasta 23, and spent the rest of the war as a prisoner.

(Sea Patrol, FLANDERS) On 29 September this officer displayed great gallantry.

In an engagement with fifteen Fokker biplanes, owing to engine trouble he was compelled to remain under his flight; he nevertheless accounted for two enemy machines, attacking one under its tail causing it to crash, and driving another down out of control.