| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Tablonal | city | Puerto Rico | United States | 18.40 | -67.17 | 16 | |
| Tablones | city | Puerto Rico | United States | 18.24 | -65.75 | 354 | |
| Tabonuco | city | Puerto Rico | United States | 18.28 | -66.89 | 1669 | |
| Tallaboa | city | Puerto Rico | United States | 17.99 | -66.72 | 170 | |
| Tallaboa Alta | city | Puerto Rico | United States | 18.05 | -66.70 | 830 | |
| Tallaboa Alta Comunidad | city | Puerto Rico | United States | 18.05 | -66.70 | 830 | |
| Tallaboa Comunidad | city | Puerto Rico | United States | 18.00 | -66.71 | 370 | |
| Tallaboa Poniente | city | Puerto Rico | United States | 18.03 | -66.73 | 328 | |
| Tamarindo | city | Puerto Rico | United States | 18.44 | -67.16 | 301 | |
| Terazas de Cupey | city | Puerto Rico | United States | 18.37 | -66.03 | 259 | |
| Teresita | city | Puerto Rico | United States | 18.41 | -66.18 | 111 | |
| Terrazas de Guaynabo | city | Puerto Rico | United States | 18.36 | -66.12 | 164 | |
| Tibes Comunidad | city | Puerto Rico | United States | 18.09 | -66.63 | 1085 | |
| Tiburones | city | Puerto Rico | United States | 17.98 | -66.54 | 3 | |
| Tiburones | city | Puerto Rico | United States | 18.43 | -66.58 | 321 | |
| Tiburones Comunidad | city | Puerto Rico | United States | 18.44 | -66.58 | 344 | |
| Tierra Linda | city | Puerto Rico | United States | 18.24 | -66.04 | 219 | |
| Tierras Nuevas Poniente | city | Puerto Rico | United States | 18.46 | -66.49 | 91 | |
| Tierras Nuevas Poniente Comunidad | city | Puerto Rico | United States | 18.46 | -66.49 | 82 | |
| Tintillo | city | Puerto Rico | United States | 18.40 | -66.13 | 101 | |
| Toa Alta | city | Puerto Rico | United States | 18.39 | -66.25 | 88 | |
| Toa Alta Zona Urbana | city | Puerto Rico | United States | 18.39 | -66.25 | 88 | |
| Toa Baja | city | Puerto Rico | United States | 18.44 | -66.26 | 13 | |
| Toa Baja Zona Urbana | city | Puerto Rico | United States | 18.44 | -66.25 | 13 | |
| Toita | city | Puerto Rico | United States | 18.13 | -66.19 | 1669 | |
| Toma de Agua | city | Puerto Rico | United States | 18.35 | -65.90 | 259 | |
| Tomás de Castro | city | Puerto Rico | United States | 18.19 | -66.03 | 853 | |
| Torre de la Sabana | city | Puerto Rico | United States | 18.42 | -65.98 | 13 | |
| Torrecillas | city | Puerto Rico | United States | 18.34 | -66.43 | 830 | |
| Torres | city | Puerto Rico | United States | 18.14 | -66.28 | 1998 | |
| Torres de Carolinas | city | Puerto Rico | United States | 18.43 | -66.00 | 9 | |
| Torrimar | city | Puerto Rico | United States | 18.39 | -66.12 | 150 | |
| Tosquero | city | Puerto Rico | United States | 18.39 | -67.20 | 39 | |
| Tosquero (historical) | city | Puerto Rico | United States | 18.48 | -67.15 | 295 | |
| Town Hills | city | Puerto Rico | United States | 18.38 | -66.26 | 91 | |
| Town Park | city | Puerto Rico | United States | 18.39 | -66.03 | 216 | |
| Tras Talleres | city | Puerto Rico | United States | 18.45 | -66.08 | 13 | |
| Treasure Island Gardens | city | Puerto Rico | United States | 18.18 | -66.15 | 1669 | |
| Treasure Valley | city | Puerto Rico | United States | 18.19 | -66.16 | 1669 | |
| Tres Hermanos | city | Puerto Rico | United States | 18.28 | -67.19 | 6 | |
| Triovegabajeno | city | Puerto Rico | United States | 18.44 | -66.38 | 72 | |
| Trujillo Alto | city | Puerto Rico | United States | 18.35 | -66.01 | 167 | |
| Trujillo Alto Zona Urbana | city | Puerto Rico | United States | 18.36 | -66.01 | 167 | |
| Trujillo Bajo | city | Puerto Rico | United States | 18.37 | -65.96 | 242 | |
| Truman | city | Puerto Rico | United States | 18.42 | -66.04 | 26 | |
| Tuque | city | Puerto Rico | United States | 17.99 | -66.66 | 3 | |
| Turabo | city | Puerto Rico | United States | 18.22 | -66.06 | 334 | |
| Turabo Gardens | city | Puerto Rico | United States | 18.22 | -66.05 | 232 | |
| Turabo Heights | city | Puerto Rico | United States | 18.22 | -66.05 | 232 | |
| Turnkey | city | Puerto Rico | United States | 18.43 | -65.88 | 6 | |
| Tío | city | Puerto Rico | United States | 18.37 | -66.18 | 95 |