| Guaratiba Biological Reserve | |
|---|---|
 Mangrove area in Barra de Guaratiba, Rio de Janeiro | |
  Location in Brazil | |
| Nearest city | Rio de Janeiro |
| Coordinates | 23°00′44″S 43°35′37″W / 23.0123°S 43.5936°W |
| Area | 2,800 hectares (6,900 acres) |
| Designation | Biological reserve |
| Created | 20 November 1974 |
Guaratiba Biological and Archeological Reserve is a State biological reserve located in the western zone of Rio de Janeiro city, in the State of Rio de Janeiro, Brazil. It protects an important area of mangroves and wetlands in the east of Guaratiba Bay.