René de Boisdeffre (3 April 1838 – 25 November 1906) was a 19th-century French composer. He is the author of some 60 pieces of chamber music as well as a few pieces for piano and vocal music. General de Boisdeffre was his cousin.
Quite conservative in his style, Boisdeffre seems to owe much to Gounod and Massenet regarding his vocal music, while his instrumental scores were influenced by Lalo and Saint-Saëns.
In May 1883, Boisdeffre was awarded the prix Chartier for his works of chamber music.