Mercedes Department is a department of Corrientes Province in Argentina.

Mercedes Department Departamento Mercedes
Department
location of Mercedes Department in Corrientes Province
Coordinates: 29°12′S 58°05′W / 29.200°S 58.083°W / -29.200; -58.083
Country	Argentina
Seat	Mercedes
Area
• Total	9,588 km2 (3,702 sq mi)
Population  (2001 census [INDEC])
• Total	39,206
• Density	4.1/km2 (11/sq mi)
Postal Code	W3470
Area Code	03773
Website	www.mercedescorrientes.gov.ar

The provincial subdivision has a population of about 39,206 inhabitants in an area of 9,588 square kilometres (3,702 sq mi), and its capital city is Mercedes, which is located around 700 kilometres (435 mi) from Buenos Aires.

It is the site of the Battle of Caaguazú during the Argentine Civil War in 1841.