The Governorate of New Castile (Gobernación de Nueva Castilla, ) was the gubernatorial region administered to Francisco Pizarro in 1529 by King Charles I of Spain, of which he was appointed governor. The region roughly consisted of modern Peru and was, after the foundation of Lima in 1535, divided. The conquest of the Inca Empire in 1531–1533, performed by Pizarro and his brothers set the basis for the territorial boundaries of New Castile.

Governorates in Hispanic America

After the territorial division of South America between Spain and Portugal, the Peruvian Hispanic administration was divided into six entities: This territorial division set the basis for the Hispanic administration of South America for several decades. It was formally dissolved in 1544, when King Charles I sent his personal envoy, Blasco Núñez Vela, to govern the newly founded Viceroyalty of Peru that replaced the governorates.