Karl Ernst Wilhelm Freiherr[a] von Canitz und Dallwitz (17 November 1787 in Kassel – 25 April 1850 in Frankfurt (Oder) was a Prussian general and statesman.

Canitz und Dallwitz came from an aristocratic family with roots in the present-day municipality of Thallwitz, in the Meissen-Saxonian area of the Mulde.

In 1821, Canitz und Dallwitz became adjutant to Prince Wilhelm, the brother of Frederick William III of Prussia, and simultaneously was a teacher at the Allgemeine Kriegsschule (General War College), which later became the Prussian Military Academy, in Berlin.

In this period he anonymously wrote the book: Betrachtungen über die Thaten und Schicksale der Reiterei in den Feldzügen Friedrichs II.

und der neuern Zeit; English: Observations on the Actions and Fates of the Cavalry in the Campaigns of Frederick II and Modern Times (2 Bde.