Carl Menckhoff (14 April 1883 – 11 January 1949) 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 commissioned as an officer.
He won the Pour le Mérite ("Blue Max"), and was given a squadron command.
Having been taken prisoner on 25 July 1918, he remained incarcerated until August 1919 when he escaped into Switzerland.
He returned to Germany where he succeeded in business, but where he was arrested in 1938 for currency infringements.
Following his release from custody he moved to Switzerland, where he remained until his death in 1949.