| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Río | city | Puerto Rico | United States | 18.23 | -65.86 | 377 | |
| Río Abajo | city | Puerto Rico | United States | 18.15 | -65.80 | 22 | |
| Río Abajo | city | Puerto Rico | United States | 18.42 | -66.39 | 282 | |
| Río Blanco | city | Puerto Rico | United States | 18.22 | -65.79 | 85 | |
| Río Blanco Comunidad | city | Puerto Rico | United States | 18.21 | -65.79 | 252 | |
| Río Cañas | city | Puerto Rico | United States | 18.05 | -66.43 | 830 | |
| Río Cañas Abajo | city | Puerto Rico | United States | 18.04 | -66.47 | 328 | |
| Río Cañas Abajo Comunidad | city | Puerto Rico | United States | 18.04 | -66.47 | 328 | |
| Río Grande | city | Puerto Rico | United States | 18.38 | -65.83 | 19 | |
| Río Grande Zona Urbana | city | Puerto Rico | United States | 18.38 | -65.84 | 45 | |
| Río Hondo | city | Puerto Rico | United States | 18.21 | -66.25 | 928 | |
| Río Jueyes | city | Puerto Rico | United States | 18.02 | -66.33 | 357 | |
| Río Lajas | city | Puerto Rico | United States | 18.39 | -66.27 | 101 | |
| Río Lajas Comunidad | city | Puerto Rico | United States | 18.40 | -66.26 | 39 |