Yvonne Loriod (20 January 1924 – 17 May 2010) was a French pianist, teacher, and composer, and the second wife of composer Olivier Messiaen. Her sister was the Ondes Martenot player Jeanne Loriod.
Loriod was born in Houilles, Yvelines, France. She studied at the Paris Conservatoire and became one of Olivier Messiaen's most avid pupils. She also studied with Marcel Ciampi and Isidor Philipp. At the age of 25, she was appointed professor at the Conservatoire National Supérieur de Musique de Paris. She went on to become a nationally acclaimed recording artist and concert pianist, and premiered most of Messiaen's works for the piano, starting in the 1940s. Messiaen said that he was able to indulge in "the greatest eccentricities", when writing for piano, knowing that they would be mastered by Loriod. Both she and her sister Jeanne often performed as the soloists in his Turangalîla-Symphonie. Loriod also orchestrated part of Messiaen's final orchestral work, Concert à quatre.
She gave the French premiere of Béla Bartók's Piano Concerto No. 2 in 1945, having learnt it in only eight days.
In 1961, Loriod married Olivier Messiaen following the death of his first wife, Claire Delbos. She is generally considered to be the most important interpreter of Messiaen's piano works. In her later years, she and Messiaen acted as mentors to the pianist Pierre-Laurent Aimard, who has since become a great champion of the works of Messiaen.
Messiaen died in April 1992. Yvonne Loriod survived him by 18 years, dying on 17 May 2010 at Saint-Denis, Paris, aged 86.