Mathieu Gascongne (first name also Matthieu or Matthias; last name also Gascogne, Gascongus, Gascone, Gasconia, and Guascogna; fl. early 16th century) was a French composer of the Renaissance. Contemporaries, such as Adrian Willaert (as quoted by the renowned Venetian theorist Zarlino) grouped him with Josquin, Ockeghem, and Jean Mouton as among the finest composers of the time. Compared with those others, however, little of his output has survived.