Karl Friedrich Krüger (18 December 1765 – 21 April 1828) was a German actor and the brother of actress Caroline Demmer.
He himself made his debut on 14 February 1785 at the Hoftheater in Berlin as Kosinsky in Schiller's drama The Robbers.
Further stations were again Amsterdam, Prague, Karlsbad, Chemnitz, Leipzig (1797–1799), Freiberg, Teplice and from 1800 Brünn.
Ignaz Franz Castelli wrote about him: Krüger was an ornament of the Viennese court theatre both in the touching and in the comical.
His sister-in-law was Franziska Romana Koch and his father-in-law was Antonín Jiránek.