La Paz is a department in the province of Mendoza, Argentina, headquartered in the town of the same name, located 145 km (90 mi) from the provincial capital.

Every January 24 the religious festival is held, with a novena and procession around the Plaza de la Villa Antigua.

On August 4, 1850, Governor Alejo Mallea renamed the town of Corocorto as La Paz and assigned a territory of more than 14,000 km2 (5,400 sq mi), so that to the north it also included what is now part of the Lavalle department.

On October 12, 1936, as part of the Tourism Promotion Plan, the Desaguadero Arch was inaugurated by the government of Ricardo Videla.

Among the most prominent we can mention: Felix Dardo Palorma: Known as the "Compadre de Cuyo", he was an Argentine singer, musician and composer, originally from the Province of Mendoza.

It is a monitoring center, made up of a system of surveillance domes with optical zoom capacity and fixed cameras, located in different strategic points of the department.