| Registered Name | Owner / Club | Status |
|---|---|---|
| Irish Whisper | Andrea Cullen Mullingar | Approved |
| Irishtown Gipsy | Lauren Delaney Thornton | Approved |
| Iron Mike | Aisling Carter Kilrainy | Approved |
| Ironman Des Hayettes | Giulia Alberghini Clonmel | Approved |
| Irresistible | Tommy Parr Cheval | Approved |
| Is MIse Spartacus | Anne Marie Horgan Highland Lodge | Approved |
| Iseq Jones | Liz Bloomer Meath | Approved |
| Iseult Valentine | Maria Doherty Tir Conaill | Approved |
| ISHD Ballerina | Imelda O'Donnell Clonmel | Approved |
| ISHD Castaway | Aiden Fogarty Rock of Cashel | Approved |
| Island Kilcombe Cailin | Aedin Morahan Sarsfield | Approved |
| Islays Diamond King | David Kealy Greenvalley | Approved |
| It's Esme (IRE) | Jacqueline O'Brien Cheval | Approved |
| Its A Capitalist | Caroline Lynch Meath | Approved |
| Its a Clover | Caroline Lynch Meath | Approved |