It is the managerial home office for the region partido of Mercedes and in addition of the legal region. The Catedral Basílica de Mercedes-Lujan, situated in the city, is the seat of the Roman Catholic Archdiocese of Mercedes-Luján. Mercedes has a populace of 51,967 individuals 51,5% ladies, 48,5% men according to the 2001 census. Mercedes was first settled as a stronghold against local indigenous assaults.
Its unique name was "La Guardia de Luján" and it was one of a few post worked in the fringes of Buenos Aires to ensure this city and accumulate the general population living in the region near. It turned into a town on 25 June 1752 when established by José de Zárate amid a military crusade known as "La Valerosa".