Malargüe is a city in the southwest part of the province of Mendoza, Argentina, about 370 km south of the provincial capital Mendoza. It i…Malargüe is a city in the southwest part of the province of Mendoza, Argentina, about 370 km south of the provincial capital Mendoza. It is the head town of the Malargüe Department, and it has about 27,000 inhabitants as per the 2010 census.