Johann Georg Leopold Mozart (November 14, 1719 – May 28, 1787) was a composer, conductor, teacher, and violinist. He is best known today as the father and teacher of Wolfgang Amadeus Mozart, and for his violin textbook Versuch einer gründlichen Violinschule.

Leopold Mozart's music is inevitably overshadowed by the work of his son Wolfgang, and in any case the father willingly sacrificed his own career to promote his son's. But Leopold's Cassation in G for Orchestra and Toys (Toy Symphony), once attributed to Joseph Haydn, remains popular, and a number of symphonies, a trumpet concerto, and other works also survive. He was much concerned with a naturalistic feel to his compositions, his Jagdsinfonie (or Sinfonia da Caccia for four horns and strings) calls for dogs and shotguns, and his Bauernhochzeit (Peasant Wedding) includes bagpipes, hurdy-gurdy, a dulcimer, whoops and whistles (ad. lib.), and pistol shots.

His oeuvre was extensive, but it has only been until recently that scholars have begun to assess the scope or the quality of it; much is lost and it is not known how representative the surviving works are of his overall output. Cliff Eisen, who wrote a doctoral dissertation on Leopold Mozart's symphonies, finds in a Symphony in G major examples of his "sensitivity to orchestral colour" and a work that "compares favourably with those of virtually any of Mozart’s immediate contemporaries."