| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Tagaran | city | Province of Isabela | Philippines | 16.9655556 | 121.7775 | 150 | 44501 |
| Talaca | city | Province of Isabela | Philippines | 17.3166667 | 121.6 | 367 | 13161 |
| Tallag | city | Province of Isabela | Philippines | 17.4211111 | 121.7244444 | 173 | 25202 |
| Tamsem | city | Province of Isabela | Philippines | 17.3947222 | 121.8125 | 150 | 19680 |
| Tamsen | city | Province of Isabela | Philippines | 17.3947222 | 121.8125 | 150 | 19680 |
| Tandul | city | Province of Isabela | Philippines | 16.8880556 | 121.6386111 | 226 | 57653 |
| Tangal | city | Province of Isabela | Philippines | 16.7005556 | 121.4658333 | 328 | 38758 |
| Tangcul | city | Province of Isabela | Philippines | 17.1686111 | 121.9186111 | 150 | 24618 |
| Tangoul | city | Province of Isabela | Philippines | 17.1686111 | 121.9186111 | 150 | 24618 |
| Tanze | city | Province of Isabela | Philippines | 16.9816667 | 121.6491667 | 164 | 45061 |
| Taotao | city | Province of Isabela | Philippines | 16.9333333 | 121.5833333 | 246 | 16630 |
| Tapay | city | Province of Isabela | Philippines | 17.0166667 | 122.2 | 1148 | 5875 |
| Tapayo | city | Province of Isabela | Philippines | 17.0166667 | 122.2 | 1148 | 5875 |
| Tappa | city | Province of Isabela | Philippines | 16.7166667 | 122.0666667 | 1414 | 4698 |
| Taringsing | city | Province of Isabela | Philippines | 16.6813889 | 121.4838889 | 298 | 38758 |
| Taroc | city | Province of Isabela | Philippines | 17.05 | 121.8333333 | 160 | 34676 |
| Tierra Virgen | city | Province of Isabela | Philippines | 16.9333333 | 121.9166667 | 170 | 33013 |
| Tuba | city | Province of Isabela | Philippines | 17.0338889 | 121.7944444 | 157 | 44253 |
| Tubo | city | Province of Isabela | Philippines | 17.0338889 | 121.7944444 | 157 | 44253 |
| Tubo | city | Province of Isabela | Philippines | 17.15 | 121.8833333 | 206 | 24197 |
| Tuboc | city | Province of Isabela | Philippines | 16.7763889 | 121.7744444 | 154 | 36076 |
| Tubog | city | Province of Isabela | Philippines | 16.7763889 | 121.7744444 | 154 | 36076 |
| Tubuc | city | Province of Isabela | Philippines | 16.7763889 | 121.7744444 | 154 | 36076 |
| Tuguegarao | city | Province of Isabela | Philippines | 16.7016667 | 121.6947222 | 219 | 23666 |
| Tuhung | city | Province of Isabela | Philippines | 17.2983333 | 121.8072222 | 137 | 25413 |
| Tuliao | city | Province of Isabela | Philippines | 17.3866667 | 121.7958333 | 160 | 19680 |
| Tumauini | city | Province of Isabela | Philippines | 17.2744444 | 121.8077778 | 134 | 23743 |
| Tunggi | city | Province of Isabela | Philippines | 17.3486111 | 121.7891667 | 111 | 29422 |
| Tungi | city | Province of Isabela | Philippines | 17.3486111 | 121.7891667 | 111 | 29422 |
| Tungui | city | Province of Isabela | Philippines | 17.2833333 | 121.8 | 104 | 23743 |
| Tupa | city | Province of Isabela | Philippines | 16.5119444 | 121.6713889 | 298 | 13593 |
| Tupac | city | Province of Isabela | Philippines | 17.4819444 | 121.8719444 | 324 | 16966 |
| Tupas | city | Province of Isabela | Philippines | 16.5119444 | 121.6713889 | 298 | 13593 |
| Tupax | city | Province of Isabela | Philippines | 16.5119444 | 121.6713889 | 298 | 13593 |
| Turayong | city | Province of Isabela | Philippines | 16.9452778 | 121.7811111 | 137 | 42233 |
| Turayung | city | Province of Isabela | Philippines | 16.9452778 | 121.7811111 | 137 | 42233 |
| Turod Norte | city | Province of Isabela | Philippines | 16.6766667 | 121.4755556 | 321 | 38758 |
| Turod Sur | city | Province of Isabela | Philippines | 16.6702778 | 121.4727778 | 318 | 38758 |
| Turog | city | Province of Isabela | Philippines | 16.6111111 | 121.675 | 259 | 15702 |
| Turud | city | Province of Isabela | Philippines | 17.245 | 121.7730556 | 206 | 19401 |
| Tuyo | city | Province of Isabela | Philippines | 17.1333333 | 121.9333333 | 167 | 24145 |
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