| Conflict: | Battle of Apóstoles |
| Partof: | the Portuguese conquest of the Banda Oriental |
| Date: | 2 July 1817 |
| Place: | Apóstoles, Misiones, Federal League, United Provinces of the Río de la Plata |
| Result: | Misiones victory |
| Combatant1: |  United Kingdom of Portugal, Brazil and the Algarves |
| Combatant2: | Misiones |
| Commander1: | Francisco das Chagas Santos |
| Commander2: | Andrés Guazurary |
| Strength1: | 600 men 2 artillery pieces |
| Strength2: | 500 men |
| Casualties1: | Unknown |
| Casualties2: | 84 men killed |
The Battle of Apóstoles was an encounter between the Luso-Brazilian forces under Francisco das Chagas Santos and the Artiguist forces led by Andrés Guazurary, popularly known as Andresito, in Apóstoles.
Brazilian general Chagas Santos had attacked the territory of the Misiones, conquering and destroying many villages. He then turned to the Headquarters of Andresito, Apósteles. The artiguist commander awaited him, inflicting heavy losses on the Portuguese and forcing them to retreat.
Most of the men who fought alongside Andresito in Apósteles were survivors of the many attacks made by the Luso-Brazilians in San Carlos, San José, Concepción, Santo Tomé, La Cruz, Mártires, San Javier and many other towns and villages in Misiones.