Formosa is the capital city of the Argentine province of Formosa, on the banks of the Paraguay River, opposite the Paraguayan town of Alberdi, about 1,200 km (746 mi) north from Buenos Aires, on National Route 11. The city has a population of about 234,000 per the 2010 census [INDEC].

Formosa Province is a province in northeastern Argentina, part of the Gran Chaco Region. Formosa's northeast end touches Asunción, Paraguay, and the province borders the provinces of Chaco and Salta to its south and west, respectively. The capital is Formosa.