The Buenos Aires Carnival is an annual event that takes place during the Carnival festivities, usually at the end of February on the streets of Buenos Aires, Argentina. The 2 days event features murga parades, colourful customs, water bombs and many other amusement activities.

During the 20th century, the Carnavales at Avenida de Mayo (de Mayo Avenue) were very popular, but they were discontinued first during the military government of the 1970s, and then during the 1990s. Mayor Aníbal Ibarra promoted the comeback of carnival (mainly into the barrios) in the mid 2000s, and the Avenida de Mayo show returned in 2006. The Murgas and other carnival groups held marches to claim for carnival holidays for everyone.Murga is a form of popular musical theatre performed primarily in Montevideo, Uruguay during the Carnival season. Murga groups also operate in Argentina, mainly during the Buenos Aires Carnival, though to a much lesser extent than in Uruguay; the Argentine murga is more centred on dancing and less on vocals than the Uruguayan one.