| Official Name: | Río Guanaco |
| Pushpin Map: | Tierra del Fuego |
| Subdivision Type: | Region |
| Subdivision Name: | Magallanes |
| Subdivision Type1: | Province |
| Subdivision Name1: | Antártica Chilena |
| Subdivision Type2: | Municipalidad |
| Subdivision Name2: | Cabo de Hornos |
| Subdivision Type3: | Comuna |
| Subdivision Name3: | Cabo de Hornos |
| Population As Of: | 2002 census[1] |
| Population Total: | 58 |
| Timezone: | Chilean Standard |
| Utc Offset: | −04:00 |
| Timezone Dst: | Chilean Daylight |
| Utc Offset Dst: | −03:00 |
| Area Code: | Country + town = 56 + ? |
Río Guanaco is a hamlet (Spanish; Castilian: caserío) on Navarino Island in the Tierra del Fuego archipelago in southern Chile. It is part of the Cabo de Hornos commune in Antártica Chilena Province.[2]