| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| University Gardens | city | Puerto Rico | United States | 18.41 | -66.07 | 55 | |
| Unión | city | Puerto Rico | United States | 17.99 | -66.55 | 13 | |
| Urbanizacion Machin | city | Puerto Rico | United States | 18.23 | -66.03 | 167 | |
| Utuado | city | Puerto Rico | United States | 18.27 | -66.70 | 830 | |
| Utuado Zona Urbana | city | Puerto Rico | United States | 18.27 | -66.70 | 830 |