Alexander McKenzie (born 1837) was a United States Navy Boatswain's Mate who received the Medal of Honor during the Korean Expedition. He was wounded in the rescue of Lieutenant Hugh McKee and was struck by a sword.

Medal of Honor citation

Rank and organization: Boatswain's Mate, United States Navy. Born: 1837, Scotland. Accredited to: New York. G.O. No.: 169, February 8, 1872. Citation: On board the U.S.S. Colorado during the capture of the Korean forts, June 11, 1871. Fighting at the side of Lt. McKee during this action, McKenzie was struck by a sword and received a severe cut in the head from the blow.