| Cayapas River | |
| Pushpin Map: | Ecuador |
| Pushpin Map Caption: | Location of mouth |
| Mouth Coordinates: | 1.2306°N -79.0452°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Ecuador |
The Cayapas River is in northern Ecuador, flowing northward from the Andes and emptying into the Pacific Ocean near San Lorenzo. The Santiago River is a principal tributary.[1]