| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Lucchetti | city | Puerto Rico | United States | 18.03 | -66.84 | 314 | |
| Luchetti | city | Puerto Rico | United States | 18.42 | -66.49 | 278 | |
| Luis Cintrón | city | Puerto Rico | United States | 18.30 | -65.64 | 29 | |
| Luis Llorens Torres | city | Puerto Rico | United States | 18.45 | -66.04 | 3 | |
| Luis Llorens Torres | city | Puerto Rico | United States | 18.06 | -66.53 | 144 | |
| Luis Lloréns Torres Comunidad | city | Puerto Rico | United States | 18.06 | -66.53 | 144 | |
| Luis M. Cintron | city | Puerto Rico | United States | 18.30 | -65.64 | 29 | |
| Luis M. Cintrón Comunidad | city | Puerto Rico | United States | 18.30 | -65.64 | 29 | |
| Luis Munoz Marin | city | Puerto Rico | United States | 18.19 | -65.97 | 305 | |
| Luquillo | city | Puerto Rico | United States | 18.37 | -65.72 | 6 | |
| Luquillo Lomas | city | Puerto Rico | United States | 18.37 | -65.73 | 157 | |
| Luquillo Mar | city | Puerto Rico | United States | 18.38 | -65.73 | 45 | |
| Luquillo Zona Urbana | city | Puerto Rico | United States | 18.38 | -65.72 | 6 | |
| Luyando | city | Puerto Rico | United States | 18.36 | -67.16 | 150 | |
| Luyando Comunidad | city | Puerto Rico | United States | 18.36 | -67.16 | 206 |