Karl Ludwig August Friedrich von Phull (or Pfuel) (6 November 1757 – 25 April 1826) was a German general in the service of the Kingdom of Prussia and the Russian Empire.
Phull served as Chief of the General Staff of King Frederick William III of Prussia in the Battle of Jena-Auerstedt.
While in Russian service, he successfully advocated for a scorched earth policy during Napoleon's invasion of Russia.