| Official Name: | Cotahuasi |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | Arequipa |
| Subdivision Type2: | Province |
| Subdivision Name2: | La Unión |
| Subdivision Type3: | District |
| Subdivision Name3: | Cotahuasi |
| Leader Title: | Mayor |
| Leader Name: | Justo Pastor Totocayo Garate |
| Settlement Type: | Village |
| Timezone: | PET |
| Utc Offset: | -5 |
| Elevation M: | 2683 |
Cotahuasi is a town in Southern Peru, capital of the province La Unión in the region of Arequipa.