| Registered Name | Owner / Club | Status |
|---|---|---|
| DSL Walk On By | Louise Parkhill Tara Hill | Approved |
| Dstud Impersonator | Myles McGowan Benbulben | Approved |
| Dubai | Sally McGrath Rock of Cashel | Approved |
| Dubai Flyer (IRE) | Suzanne Deeney Wylie Letterkenny | Approved |
| Dubarry Bay | Megan Stokes Clonough | Approved |
| Dubh Deas | Emma Jean Kavanagh Barnacarroll | Approved |
| Ducharraig | Mary Ann Casey Greenhills | Approved |
| Duchess of Stradone | Brian Tully Lakelands | Approved |
| Dudley Do Right | Dervla Quinn Greenvalley | Approved |
| Duharra Cruise | Avril Clear Dunbyrne | Approved |
| Duie One | Maria Tyrell Dunamase | Approved |
| Duinin | Sue Perry Rock of Cashel | Approved |
| Duke of Ballyhoura | Ann Marie Cronin Clonshire | Approved |
| Duke of Rockingham | Eamonn Perrin Benbulben | Approved |
| Duke of Windsor | Nicola O' Sullivan Earl's Well | Approved |