The governor of Tucumán, Juríes and Diaguitas ruled the Spanish province (also: Gouvernement, Spanish: Gobernación ), which existed in the northwest of what is now the Republic of Argentina .
First, the area under the donations of King was Charles V in the areas of Neutoledo and New Andalusia . The boundaries of these areas were drawn abstractly regardless of natural spaces and formed sections of 200 miles in a north-south direction from the Atlantic to the Pacific. With the first permanent settlement and the establishment of the Gobernación de Nueva Extremadura (later renamed General Capitanate Chile ) the administration of the Spanish possessions was organized.
In 1663 Tucumán was briefly subordinated to the first Real Audiencia of Buenos Aires ; after its dissolution in 1671, the governors reported back to Charcas . In 1776 the Spaniards founded their own viceroyalty of the Río de la Plata , which also included Tucumán. With the administrative reforms of 1782, the rule of the governors of Tucumán ended when the province was converted into an Intendencia of the Viceroyalty.