| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Thixendale | chestnut | f | 1938 | Caerleon | Thoroughbred | Great Britain | ||
| Thong | bay | f | 1964 | Nantallah | Rough Shod II | Thoroughbred | Great Britain | |
| Thor | bay | c | 1930 | Ksar | Lasarte | Thoroughbred | France | |
| Thora | f | 1954 | Asterios | Thusnelda | Thoroughbred | Germany | ||
| Thora | bay | f | 1878 | Longfellow | Susan Ann | Thoroughbred | USA | |
| Thoreau | d.-bay | c | 2008 | Gone West | Madame Thor | Thoroughbred | USA | |
| Thoris | chestnut | f | 1950 | Heliopolis | Miss Zibby | Thoroughbred | USA | |
| Thormanby | chestnut | c | 1857 | Windhound | Alice Hawthorn | Thoroughbred | Great Britain | |
| Thorn Apple | chestnut | f | 1937 | Jamestown | Last Straw | Thoroughbred | USA | |
| Thorn Dance | bay | c | 1986 | Northern Dancer | Barb's Bold | Thoroughbred | USA |