António Leal Moreira (born Abrantes, June 30, 1758 - died Lisbon, November 26, 1819) was a Portuguese composer and organist. He composed a large number of operas, most of which were premiered in Lisbon; much of the rest of his output is sacred, though he composed a handful of symphonies as well. One of his works, Sinfonia para a Real Basílica de Mafra (Symphony for the Royal Basilica of Mafra), is an organ symphony composed specifically for the 6 organs of Mafra National Palace's Basilica.