Carl Menckhoff (14 April 1883 - 11 January 1948) was a German First World War fighter ace, credited with 39 confirmed victories. Already in his 30s when he learned to fly, he was one of the oldest pilots in the Imperial German Air Service. He transferred from infantry service to aviation as a non-commissioned officer, but afterwards succeeded in being was later commissioned as an officer. He won the Pour le Mérite ("Blue Max"), and was given a squadron command.