Las MarianasLas Marianas is a town located in the Navarro Partido in the province of Buenos Aires, Argentina.GeographyLas Marianas is located from the town of Navarro and from the city of Buenos Aires.HistoryThe land around the town was first purchased by an attorney in the late 1700s. Around the late 19th century, land was sold in the region for a train station. Las Marianas was founded on December 29, 1908. Rail service to the town ended in 1993.PopulationIn the mid-20th century, the town's population peaked at around 1,500. According to INDEC, which collects population data for the country, the town had a population of 471 people as of the 2001 census.