Louis Diémer Free sheet music
- Born: 14th February 1843
- Died: 21st December 1919
- Birthplace: Paris, France
Louis-Joseph Diémer was a French pianist and composer. He was the founder of the Société des Instruments Anciens in the 1890s, and gave recitals on the harpsichord. His output as a composer was extensive, including a piano concerto and a quantity of salon pieces, all more or less forgotten these days.