Jeanne Marie-Madeleine Demessieux (13 February 1921 – 11 November 1968) was a French organist, pianist, composer, and teacher. She was the chief organist at Saint-Esprit for 29 years and at La Madeleine in Paris starting in 1962. She performed internationally as a concert organist and was the first female organist to sign a record contract. She went on to record many organ works, including her own compositions.