| Jayaco River | |
| Name Other: | Río Jayaco |
| Pushpin Map: | Dominican Republic |
| Pushpin Map Caption: | Location of mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | Dominican Republic |
| Subdivision Type3: | Provinces |
| Subdivision Name3: | Monseñor Nouel |
| Subdivision Type5: | City |
| Subdivision Name5: | Sabana del Puerto |
| Length: | 14.58km (09.06miles) |
| Source1: | Cordillera Central |
| Source1 Location: | Hoyo Redonda, Bonao, Monseñor Nouel, Dominican Republic |
| Source1 Coordinates: | 19.1014°N -70.5206°W |
| Source1 Elevation: | 700m (2,300feet) |
| Mouth: | Rincón Reservoir (Jima River) |
| Mouth Location: | Sabana del Puerto, Bonao, Monseñor Nouel, Dominican Republic |
| Mouth Coordinates: | 19.0589°N -70.4217°W |
| Mouth Elevation: | 0m (00feet) |
| Tributaries Left: | None |
| Tributaries Right: | None |
Jayaco River (Spanish: Río Jayaco) is a 14.582NaN2[1] long river in the Dominican Republic province of Monseñor Nouel. A part of the Yuna River watershed, the river originates in Hoyo Redonda within the Cordillera Central mountain range.The river flows east from its source and reaches its mouth at the Rincón Reservoir (Spanish: Presa de Rincón), a part of the Jima River.