The Primera Junta or First Assembly is the most common name given to the first independent government of Argentina.

It is created on May 25, 1810, as a result of the events of the May Revolution.

The Junta initially has representatives from only Buenos Aires.

When it is expanded, as expected, with the addition of the representatives from the other cities of the Viceroyalty of the Río de la Plata, it becomes popularly known instead as the Junta Grande (Grand Council).

The Junta operates at El Fuerte (the fort, where the modern Casa Rosada stands), which had been used since 1776 as a residence by the Viceroys.