Praça XV de Novembro, Colonial square in Centro district, Rio de Janeiro, Brazil

Praça XV de Novembro is an open square in the Centro district of Rio de Janeiro, surrounded by buildings from the colonial period and a baroque fountain dating to the late 18th century. A ferry terminal and tram stop sit at the edge, where pathways branch in several directions.

The square originally served as the arrival point for the Portuguese royal family in the early 19th century, connecting the harbor district with the administrative center. In November 1889, the end of the monarchy was announced here, turning the site into a symbol of political change in Brazil.

The square's name marks 15 November 1889, when Brazil became a republic, replacing the monarchy in force since 1822. The date is also recalled by the equestrian statue of General Osório, inaugurated in 1894 and cast from bronze of cannons taken in the Paraguayan War. Since 2011 the square has been used by skateboarders of the I Love XV movement, and a 2016 portaria allowed skating at any hour.

The ferry to Niterói departs from the terminal regularly throughout the day, and several bus lines stop along the adjacent streets for connections to other parts of the city. Weekends bring more visitors due to markets and events, while weekday use remains quieter.

A municipal decree of 1999 banned skateboarding in the city's squares, parks and gardens. The skaters' group I Love XV obtained a permit in 2011 for set hours, and in November 2016 the parks foundation authorised skating at Praça XV at any time.