| Wild Dayrell | |
|---|---|
 Wild Dayrell. One of the earliest photographs of a racehorse. | |
| Sire | Ion |
| Grandsire | Cain |
| Dam | Ellen Middleton |
| Damsire | Bay Middleton |
| Sex | Stallion |
| Foaled | 1852 |
| Country | United Kingdom of Great Britain and Ireland |
| Colour | Brown |
| Breeder | Francis Popham |
| Owner | Francis Popham |
| Trainer | John Rickaby |
| Record | 4:3-0-0 |
| Major wins | |
| Epsom Derby (1855) | |
Wild Dayrell (1852–1870) was a British Thoroughbred racehorse and sire. In a career that lasted from October 1854 to September 1855 he ran four times and won three races including The Derby. He was an unusual Derby winner, as neither his owner nor his trainer had any previous experience of Thoroughbred racing. Wild Dayrell was retired to stud at the end of his three-year-old season, and had some success as a stallion, siring several good winners.