Jean-Pierre Leguay (born 1939) is a French organist, composer and improviser. He studied with André Marchal, Rolande Falcinelli, Olivier Messiaen and others. He served as titular organist at Notre-Dame-des-Champs, Paris from 1961 to 1984, followed by a position as co-titular organist at the Cathedral of Notre-Dame de Paris, from 1985 until his retirement in 2016.

He has written over eighty works for various instrumental and vocal groups, and has recorded several CDs with repertoire from the 17th to the 21st century, notably Bach, Haydn, Mozart, Beethoven, Liszt, Brahms, Franck, Vierne, as well as his own compositions and improvisations.