| Pirris River | |
| Name Other: | Rio Pirris |
| Pushpin Map: | Costa Rica |
| Pushpin Map Caption: | Location of mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | Costa Rica |
| Mouth Location: | Pacific Ocean |
| Mouth Coordinates: | 9.4921°N -84.333°W |
Pirris River is a river of Costa Rica, flowing into the Pacific Ocean.[1] [2]