| Laguna de Castillos | |
| Location: | Rocha Department of Uruguay |
| Coordinates: | -34.3172°N -53.9294°W |
| Type: | lagoon |
| Inflow: | Arroyo Castillos |
| Outflow: | Arroyo Valizas |
| Pushpin Map: | Uruguay |
| Pushpin Map Alt: | Location of the body of water in Uruguay. |
Laguna de Castillos is an important water body in the Rocha Department of Uruguay. It is located south of Castillos and northeast of Rocha. It is considered an important wildlife refuge and bird sanctuary.[1]