Mackenzie Peninsula () is a steep, rocky peninsula forming the west end of Laurie Island, in the South Orkney Islands. First seen and roughly charted by Captain George Powell and Captain Nathaniel Palmer in 1821. Surveyed in 1903 by the Scottish National Antarctic Expedition under William S. Bruce, who gave this peninsula the maiden name of his wife.
This article incorporates public domain material from the United States Geological Survey document "Mackenzie Peninsula" (content from the Geographic Names Information System).