| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Tewin | city | Hertfordshire | United Kingdom | 51.82 | -0.15 | 239 | 41901 |
| Therfield | city | Hertfordshire | United Kingdom | 52.02 | -0.05 | 830 | 8781 |
| Thorley | city | Hertfordshire | United Kingdom | 51.85 | 0.15 | 236 | 39732 |
| Thundridge | city | Hertfordshire | United Kingdom | 51.83 | -0.02 | 213 | 27060 |
| Tring | city | Hertfordshire | United Kingdom | 51.78 | -0.65 | 830 | 12152 |