iBbY Ireland Constituent Organisations, Founding and Current Members:
- Association of Secondary Teachers Ireland
- Children's Books Ireland/ Leabhair Pháistí Éireann
- Church of Ireland College of Education
- Cork City Library
- Comhar na Múinteoirí Gaeilge
- Dublin City Public Libraries
- Dun Laoghaire Rathdown Libraries
- Froebel College
- An Gúm
- Idirmhalartán Litríocht Éireann / Ireland Literature Exchange
- Irish Copyright Licencing Agency
- Irish National Teachers' Organisation
- Irish Writers' Union
- Kids' Own Publishing Partnership
- Little Island
- Louth County Library
- Marino Institute of Education
- Mayo County Library
- Meath County Library
- National Library of Ireland
- Poetry Ireland Éigse Éireann
- Publishing Ireland
- Reading Association of Ireland
- School Library Association of Ireland
- St. Michael's College (Secondary school)
- School Library Association (ROI Branch)
- Teachers' Union of Ireland
- The Ark, A Cultural Centre for Children
- The Booksellers' Association of the United Kingdom & Ireland
- The Children's Press
- The Educational Company of Ireland
- The O'Brien Press
- Wolfhound Press
- Youth Libraries Group