Ignace Xavier Joseph Leybach (17 July 1817 in Gambsheim, Alsace – 23 May 1891 in Toulouse) was a teacher, pianist and organist, and a composer of salon piano music.
He had his early training as an organist with Joseph (?) Wackenthaler, the organist and maître de chapelle of the cathedral of Strasbourg, and then was a pupil in Paris of Friedrich Kalkbrenner and of Chopin. He was a famous pianist in his time, but is largely remembered for a single piece, his Fifth Nocturne, Op. 52, number 5, for solo piano; it is still in print. His Fantasie elegante improvised on familiar themes from Gounod's Faust.