Misiones is one of the 23 provinces of Argentina, located in the northeastern corner of the country. Area: 29,801 km². Population: 963,869 (2001). Capital city: Posadas.

It is surrounded by Paraguay to the northwest, Brazil to the north and east, and Corrientes Province of Argentina to the southwest.

The Iguaçú Falls are waterfalls located on the border of Brazilian state of Paraná (in the Southern Region) and the Argentinian Province of Misiones.

The province is named after the Jesuit missions (Reducciones ), which were established in the area. Of the 15 Reducciones established in Argentina, 11 were located in the present Misiones Province. Of these 11, 4 were listed as UNESCO World Heritage Sites in 1984: San Ignacio Mini , Nuestra Señora de Santa Ana , Nuestra Señora de Loreto , Santa María la Mayor .

The province is divided in 17 departments (Spanish departamentos).

Department (Capital)

1. Apóstoles (Apóstoles)
2. Cainguás (Campo Grande)
3. Candelaria (Santa Ana)
4. Capital (Posadas)
5. Concepción de la Sierra (Concepción de la Sierra)
6. Eldorado (Eldorado)
7. General Belgrano (Bernardo de Irigoyen)
8. Guaraní (El Soberbio)
9. Iguazú (Puerto Esperanza)
10. Leandro N. Alem (Leandro N. Alem)
11. Libertador General San Martín (Puerto Rico)
12. Montecarlo (Montecarlo)
13. Oberá (Oberá)
14. San Ignacio (San Ignacio)
15. San Javier (San Javier)
16. San Pedro (San Pedro)
17. Veinticinco de Mayo (Alba Posse)

There is also a Misiones department in neighboring Paraguay.