Ludwig Deppe (7 November 1828 – 5 September 1890) was a German violinist, composer and conductor, known particularly as a piano teacher.

American pianist Amy Fay studied with Deppe from 1873 to 1875 and described his piano pedagogy in vivid terms in her 1880 memoir Music-Study in Germany.

Elisabeth Caland detailed his method in her 1903 volume, Artistic Piano Playing as Taught by Ludwig Deppe.

Grove's Dictionary summarized Deppe's approach as “the acquirement of an absolutely even touch by the adoption of a very soft tone and a slow pace in practicing, a seat much lower than most teachers recommend, and minute attention to the details of muscular movement.”[3] In Johannes Brahms: Life and Letters, Styra Avins notes that Deppe was a close friend of Johannes Brahms and a student of Brahms’s piano teacher, Marxsen.

ISBN 3-7959-0854-X Fay, Amy: Music-Study in Germany (Chicago, 1880, Reprint New York 1991) ISBN 0548745412 Ydefeldt, Stefan, Die einfache runde Bewegung am Klavier: Bewegungsphilosophien um 1900 und ihre Auswirkungen auf die heutige Klaviermethodik, (2018) Augsburg: Wissner Verlag orig.