Pedro Morales y Mercado (c. 1610 - c. 1670) was a 17th-century Spanish nobleman, who held different honorific positions in the Río de la Plata, serving as mayor, army officer and treasurer of Buenos Aires.

On January 1, 1651 Antonio de la Torre Herrera and Pedro Morales y Mercado, swore before the Governor Jacinto de Láriz, as mayors of first and second vote of the City of Buenos Aires.

[4] That same year, Morales was named Alférez Real, being in charge of carrying the Royal Standard in the St. Martin's Day.

[5] Pedro Morales y Mercado served for more than thirty years to the Spanish Empire.

[6] He also had held various senior positions during the Viceroyalty of Peru, serving as Captain, Chief Justice[7] and Treasurer of Buenos Aires.