Posadas (Spanish pronunciation: [poˈsaðas]) is the capital city of the Argentine province of Misiones, in its south, at the far north-west of the country on the left bank of the Paraná River, opposite Encarnación, Paraguay.

Posadas is connected to the Paraguayan city of Encarnación by the San Roque González de Santa Cruz Bridge.

The General José de San Martín Airport (IATA: PSS, ICAO: SARP), at coordinates 27°22′S 55°58′W / 27.367°S 55.967°W / -27.367; -55.967, is seven kilometres from the city, and features regular flights to Buenos Aires.

Following the end of the war, Paraguay renounced all claims to the area, and in 1879, the town was renamed after Gervasio Antonio de Posadas, the Supreme Director of the Argentine Confederation (1814).

The National University of Misiones was established at Posadas in 1973, and in 1990, the city's cultural and economic links to Encarnación were strengthened with the completion of the San Roque González de Santa Cruz Bridge.