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.

Rank and organization: Boatswain's Mate, United States Navy.

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.