O'Halloran
- Barry O'Halloran
- Brian O'Halloran
- Clann Fhearghaile
- County Clare
- County Galway
- Crichaireacht cinedach nduchasa Muintiri Murchada
- David O'Halloran
- Dustin O'Halloran
- Dál gCais
- Gaels
- Galway
- Greg O'Halloran
- Hal O'Halloran
- Halloran (disambiguation)
- Halloran Springs, California
- House of Burke
- Irish language
- Irish people
- Jack O'Halloran
- James O'Halloran (politician)
- Joseph O'Halloran
- Kay O'Halloran
- Keith O'Halloran
- Kevin O'Halloran
- Kevin O'Halloran (footballer)
- Mark O'Halloran (rugby league)
- Mark O'Halloran (writer)
- Martin O'Halloran
- Michael O'Halloran (disambiguation)
- Mick O'Halloran
- O'Halloran Hill, South Australia
- Sharyn O'Halloran
- Stephen O'Halloran
- Sylvester O'Halloran
- Thomas Joseph Shuldham O'Halloran
- Thomas O'Halloran (Australian footballer)
- Thomas O'Halloran (disambiguation)
- Thomas Shuldham O'Halloran
- Thomas Shuldham O'Halloran (lawyer)
- Tom O'Halleran
- Tom O'Halloran (Australian footballer)
- Tom O'Halloran (climber)
- William Littlejohn O'Halloran
- William O'Halloran (cricketer)
- William O'Halloran (trade unionist)
- Ó Flaithbheartaigh