| Portland Threlkeld | United Kingdom Time | -08:00 |
| Portland Faridabad | India Standard Time | -13:30 |
| Portland Thriprayar | India Standard Time | -13:30 |
| Portland Farafra | Eastern European Time | -10:00 |
| Portland Thrissur | India Standard Time | -13:30 |
| Portland Fanwood | Eastern Time | -03:00 |
| Portland Thuckalay | India Standard Time | -13:30 |
| Portland Fameck | Central European Time | -09:00 |
| Portland Thousand Palms | Pacific Time | 00:00 |
| Portland Fangchenggang | China Time | -16:00 |
| Portland Thurso | United Kingdom Time | -08:00 |
| Portland Fallon | Pacific Time | 00:00 |
| Portland Thusis | Central European Time | -09:00 |
| Portland Falls Church | Eastern Time | -03:00 |
| Portland Thung Song | Indochina Time | -15:00 |
| Portland Falmouth | Eastern Time | -03:00 |
| Portland Thornbury | United Kingdom Time | -08:00 |
| Portland Falset | Central European Time | -09:00 |
| Portland Thornleigh | Eastern Australia Time | -19:00 |
| Portland Thoothukudi | India Standard Time | -13:30 |
| Portland Thoppur | India Standard Time | -13:30 |
| Portland Thorley | United Kingdom Time | -08:00 |
| Portland Thornton | Eastern Time | -03:00 |
| Portland Thompsonville | Eastern Time | -03:00 |
| Portland Thong Nian | Indochina Time | -15:00 |
| Portland Thibodaux | Central Time | -02:00 |
| Portland Thirupathi | India Standard Time | -13:30 |
| Portland Thodupuzha | India Standard Time | -13:30 |
| Portland Thiruverumbur | India Standard Time | -13:30 |
| Portland Thị xã Phú Thọ | Indochina Time | -15:00 |
| Portland Thirroul | Eastern Australia Time | -19:00 |
| Portland Tacloban City | Philippine Time | -16:00 |
| Portland Swillington | United Kingdom Time | -08:00 |
| Portland Sweet Home | Pacific Time | 00:00 |
| Portland Swansboro | Eastern Time | -03:00 |
| Portland Swanage | United Kingdom Time | -08:00 |
| Portland Sydney | Eastern Australia Time | -19:00 |
| Portland Sydney | Eastern Australia Time | -19:00 |
| Portland Sydney | Eastern Australia Time | -19:00 |
| Portland Sylvester | Eastern Time | -03:00 |
| Portland Sylvan Lake | Mountain Time | -01:00 |
| Portland Tabio | Colombia Time | -03:00 |
| Portland Syracuse | Central European Time | -09:00 |
| Portland Santa Catarina | Central Time | -02:00 |
| Portland Santa Ana | Central Time | -02:00 |
| Portland Santa Ana | Mexican Pacific Time | -01:00 |
| Portland Sant Josep de sa Talaia | Central European Time | -09:00 |
| Portland Sant Miquel de Campmajor | Central European Time | -09:00 |
| Portland Sankt Blasien | Central European Time | -09:00 |
| Portland Sankt Ibb | Central European Time | -09:00 |