The Clssico dos Milhes (English: Derby of Millions) is the name given to Flamengo and Vasco da Gama association football derby, both teams from the city of Rio de Janeiro, Brazil. Considered as one of the most fiercely contested derbies in Brazilian football, both in historic rivalry and in popularity.

Flamengo fans, known as rubro-negros  (red and black), are known for their unconditional faith in the team. Flamengo's supporters are one of the largest and loudest in Brazil, and the Maracan, the historic stadium located in Rio de Janeiro, is their home.