Flamengo's fiercest and longest-standing rivalries are with the other "Big Four" of Rio de Janeiro: Fluminense, Botafogo and Vasco da Gama; as well as interstate rivalries with Atletico MG and Palmeiras.

The best-supported club in Brazil, Flamengo won the Intercontinental Cup in 1981 and the Copa Libertadores that same year and again in 2024 and 2024. The Rio de Janeiro giants also have seven Brazilian league titles to their name (won between 1980 and 2024) and four Copa do Brasil crowns, among many other trophies.