| Maracanã River | |
| Source1 Location: | Maciço do Tijuca/Sumaré Hill |
| Mouth Location: | Guanabara Bay |
| Subdivision Type1: | Country |
| Subdivision Name1: | Brazil |
| Length: | 7 km |
| Mouth Elevation: | sea level |
| Subdivision Name2: | Rio de Janeiro state |
| Subdivision Type2: | State |
| Subdivision Type3: | City |
| Subdivision Name3: | Rio de Janeiro |
The Maracanã River of Rio de Janeiro (Portuguese: pronounced as /pt/), which means parrot-like in Tupi–Guarani, is a river located in Rio de Janeiro state in southeastern Brazil.
The Maracanã River flows, now canalized, eastwards through the northern districts and neighbourhoods of the city of Rio de Janeiro to its mouth at the Canal do Mangue, that eventually flows into Guanabara Bay.
The Estádio do Maracanã, one of the largest football stadiums in the world, was named after the Maracanã River. The nearby and smaller Ginásio do Maracanãzinho indoor arena is a derivative name, Maracanãzinho meaning Little Maracanã.
The subsequently developed Maracanã neighbourhood around the stadium and that which the river flows through, took its name from the stadium.