| Río San Juan | |
| Pushpin Map: | Dominican Republic |
| Pushpin Relief: | 1 |
| Mapsize: | 19.644487,-70.077542 |
| Coordinates: | 19.64°N -70.08°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | María Trinidad Sánchez |
| Area Total Km2: | 272.19 |
| Area Footnotes: | [1] |
| Elevation M: | 5 |
| Elevation Footnotes: | [2] |
| Population Total: | 16998 |
| Population As Of: | 2012 |
| Total Type: | Total |
| Population Density Km2: | auto |
| Population Footnotes: | [3] |
| Blank Name: | Distance to – Nagua |
| Blank Info: | 35 km |
| Blank1 Name: | Municipal Districts |
| Blank1 Info: | 2 |
Río San Juan is a municipality in the María Trinidad Sánchez province of the Dominican Republic.