| Macacu River | |
|---|---|
 Rio Macacu in Boca do Mato | |
  | |
| Native name | Rio Macacu (Portuguese) |
| Location | |
| Country | Brazil |
| Physical characteristics | |
| Source | |
| • location | Rio de Janeiro state |
| Mouth | |
• location | Guanabara Bay |
• coordinates | 22°41′37″S 43°01′59″W / 22.693625°S 43.033074°W |
• elevation | 0 m (0 ft) |
The Macacu River (Portuguese: Rio Macacu) is a river of Rio de Janeiro state in southeastern Brazil.