Culture magazines
- O'Donoghue, Bernard
- O'Donohoe, Nick
- O'Dor, Ronald Keith
- O'Driscoll, Dennis
- O'Driscoll, Dennis
- O'Faolain, Julia
- O'Faolain, Nuala
- O'Faolain, Sean 1900–1991
- O'Farrell, Padraic
- O'Farrell, Patrick (James)
- O'Flaherty, James Carneal
- O'Flaherty, Liam 1896–1984
- O'Grady, Desmond (James Bernard)
- O'Grady, Desmond (James Bernard)
- O'Grady, John P.
- O'Grady, Rohan
- O'Hagan, Andrew
- O'Hanlon, Ardal
- O'Hanlon, Michael E(dward)
- O'Hara's Wife