Leonid Kreutzer (13 March 1884 in St. Petersburg – 30 October 1953 in Tokyo) was a classical pianist.

Amongst Kreutzer's students were Władysław Szpilman, Hans-Erich Riebensahm, Vladimir Horbowski, Karl-Ulrich Schnabel, Franz Osborn, Boris Berlin, Ignace Strasfogel, Franz Reizenstein and Grete Sultan.

Leonid Kreutzer also gave musically and technically demanding solo recitals, mostly dedicated to specific composers or themes.

The Nazis targeted him prominently as a cultural enemy: Together with Frieda Loebenstein he is the one of two pianists whose name appears in a list of "tidy-up tasks" ("Aufräumungsarbeiten") compiled by Rosenberg's "Kampfbund für deutsche Kultur" (Battle-Union for German Culture).

He wrote one of the first works on systematic use of the piano pedal ("Das normale Klavierpedal vom akustischen und ästhetischen Standpunkt", 1915).