| Colachi | |
| Elevation M: | 5631 |
| Elevation Ref: | [1] |
| Range: | Andes |
| Location: | Antofagasta Region, Chile |
| Map: | Chile |
| Relief: | 1 |
| Map Size: | 150 |
| Label Position: | left |
| Coordinates: | -23.2364°N -67.645°W |
| Type: | Stratovolcano |
| Last Eruption: | Unknown |
Colachi is a stratovolcano in the Antofagasta Region of northern Chile. It was built on a basement of ignimbrites.[1] A 7 km² silicic lava flow lies on the saddle between the volcano and Acamarachi.[1]
Colachi is part of a chain of stratovolcanoes stretching along the eastern side of the Salar de Atacama, the most active of which being Lascar.