The Council of the Indies, officially the Royal and Supreme Council of the Indies, was the most important administrative organ of the Spanish Empire for the Americas and those territories it governed, such as the Spanish East Indies. The crown held absolute power over the Indies and the Council of the Indies was the administrative and advisory body for those overseas realms. It was established in 1524 by Charles V to administer "the Indies", Spain's name for its territories. Such an administrative entity, on the conciliar model of the Council of Castile, was created following the Spanish conquest of the Aztec empire in 1521, which demonstrated the importance of the Americas. Originally an itinerary council that followed Charles V, it was subsequently established as an autonomous body with legislative, executive and judicial functions by Philip II of Spain and placed in Madrid in 1561.

The Spanish Empire, sometimes referred to as the Hispanic Monarchy or the Catholic Monarchy, was a colonial empire that existed between 1492 and 1976. In conjunction with the Portuguese Empire, it ushered in the European Age of Discovery. It achieved a global scale, controlling vast portions of the Americas, Africa, various islands in Asia and Oceania, as well as territory in other parts of Europe. It was one of the most powerful empires of the early modern period, becoming known as "the empire on which the sun never sets". At its greatest extent in the late 1700s and early 1800s, the Spanish Empire covered over 13 million square kilometres, making it one of the largest empires in history.