Sheets of Ireland, 1991
| Issuer | Date | Desc | State | ||
| - |  |
Ireland | 3/5/1991 | sheet of 3 types | all added |
| - |  |
Ireland | 4/11/1991 | European Cultural capital, empty sheet (#59019) | incomplete |
| - |  |
Ireland | 4/11/1991 | European Cultural capital, empty sheet (#59020) | incomplete |
| - |  |
Ireland | 5/14/1991 | Europa 1991, sheet of 1 type | all added |
| - |  |
Ireland | 5/14/1991 | Europa 1991, sheet of 1 type | all added |
| - |  |
Ireland | 5/14/1991 | empty sheet (#59021) | incomplete |
| - |  |
Ireland | 10/17/1991 | empty sheet (#59022) | incomplete |
| - |  |
Ireland | 10/17/1991 | empty sheet (#59023) | incomplete |
| - |  |
Ireland | 10/17/1991 | empty sheet (#59024) | incomplete |
| - |  |
Ireland | 10/17/1991 | empty sheet (#59025) | incomplete |
| - |  |
Ireland | 11/14/1991 | Christmas 1991, sheet of 1 type | all added |