| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| Yokama | chestnut | f | 1993 | Irish River | Dicken's Miss | Thoroughbred | USA | |
| Yolanda B. Too | d.-bay | f | 2002 | Two Punch | Avie's Lady | Thoroughbred | USA | |
| Yonaguska | d.-bay | c | 1998 | Cherokee Run | Marital Spook | Thoroughbred | USA | |
| Yonne | bay | f | 1936 | Indus | Thoroughbred | France | ||
| Yonnie Girl | grey | f | 1966 | Call the Witness | Po'Chile | Thoroughbred | USA | |
| Yorick | bay | c | 1951 | Sunny Boy | Lady Macbeth | Thoroughbred | France | |
| 6841-8 York Fayn | grey | f | 2013 | 643090000030041 | 1015-5 York Fire | 2985-5 Fun Time | Thoroughbred | Eklips Farm |
| 1015-5 York Fire | chestnut | c | 2007 | 643094100002935 | Johannesburg | Fairy Dancer | Thoroughbred | USA |
| York Gala | bay | f | 1939 | Thoroughbred | Great Britain | |||
| Yorkshire | bay | c | 1834 | St. Nicholas | Thoroughbred | Great Britain |