Marie Sophie Gräfin von Brühl (Countess Marie Sophie von Brühl; (3 June 1779 – 28 January 1836)) was a member of the noble German von Brühl family originating in Thuringia. Despite her own career as a patron of the arts in Berlin, she is known for editing and publishing the work of her husband Carl von Clausewitz, especially his military treatise On War.