Franz Xaver Haberl (12 April 1840, in Oberellenbach (today Mallersdorf-Pfaffenberg), Lower Bavaria – 5 September 1910, in Ratisbon) was a German musicologist, friend of Liszt, Perosi, and Singenberger, cleric, and student of Proske. He fought for the against the editions of Solesmes and others. In 1868 Haberl re-edited the Medicæa version of the Gregorian chant, and the Holy See declared his edition authentic and official for the Catholic Church. This form of the chant has since been superseded by the "Editio Vaticana." One of Haberl's most famous students was Lorenzo Perosi.