Rivadavia Square, Square in La Plata, Buenos Aires Province, Argentina

Rivadavia Square is a central plaza in La Plata featuring French-inspired symmetrical landscaping and multiple park areas. The space contains walking paths, green zones, fountains, and various monuments distributed throughout its grounds.

One of the first squares laid out in La Plata, it was initially called Plaza de la Policía after the police department building on street 2, today the Ministry of Security. A municipal ordinance of 24 September 1901 renamed it Plaza Rivadavia. On Avenida 1 stood Pedro Benoit's 1884 entrance arch to Paseo del Bosque, a smaller copy of the Paris Opera arch, demolished in 1911; the Monument to Admiral Brown was placed there on 11 June 1955.

The square's first name, Plaza de la Policía, came from the police headquarters on street 2, today the Ministry of Security. On summer nights in the city's early years, La Plata's upper class gathered here to hear concerts by the police music band, since there were few other places for entertainment.

The square is bounded by streets 1, 2, 51 and 53, with the Ministry of Security building on street 2. Two small side plazas flank it: República de Siria on avenue 51, facing the Instituto Médico Platense, and República del Líbano on avenue 53, facing the Curutchet house.

The marble monument to Bernardino Rivadavia, ordered by decree of 28 July 1886, is the work of sculptor Pietro Costa and was placed in its current spot on 18 April 1909. On Avenida 1 stands the Monument to Admiral Brown, raised on 11 June 1955: a single-piece red granite column from the Sierra Chica quarries, 1.70 m in diameter and 8.30 m tall, topped by a 4 m bronze figure of the admiral.