Rio de Janeiro is a city in Brazil.

Rio de Janeiro may also refer to:

Rio de Janeiro (state), a state of Brazil Greater Rio de Janeiro, the metropolitan area of the city in Brazil A former name for Guanabara Bay Rio de Janeiro (Bahia), a river in the Brazilian state of Bahia Río de Janeiro (Buenos Aires Metro), a metro station in Buenos Aires Protocol of Rio de Janeiro, a 1942 international agreement , a song by Omer Adam

See also Battle of Rio de Janeiro (disambiguation) Rio de Janeiro (ship)