| Piraí River | |
|---|---|
 | |
| Location | |
| Country | Bolivia |
| Physical characteristics | |
| Source | |
| • location | near Quirusillas, Santa Cruz Department |
| Mouth | |
• location | Yapacani River |
The Piraí River is a river of Bolivia. Santa Cruz de la Sierra, Bolivia's largest city by population, is located on this river. The Piraí is a major tributary of Yapacaní River.