Pérez is a city in the. It is part of the Greater Rosario metropolitan area, and lies 175 km south of the provincial capital (Santa Fe). It has a population of about 25,000 inhabitants.The town was founded in 1876 by Eduardo Pérez and María Pérez de Jolly. It became officially a commune (comuna) on 20 November 1905, and a city on 4 November 1971.