The following organisations are members of ARC Northern Ireland:
- Action Mental Health
- Autism Initiatives
- Barnlee Residential Home
- Beeches P&T Services Ltd
- Blair Lodge
- Camphill Community (Clanabogan)
- Camphill Community (Glencraig)
- Camphill Community (Mourne Grange)
- Caring Breaks
- Castleview Nursing Home
- Cedar Foundation
- Compass Advocacy Group Ltd
- Croft Community
- Derg Valley Care
- Downe Residential Project
- EXTERN
- Firs Residential Home
- Glen Caring Services
- Health Matters
- Kilcreggan Homes
- L‘Arche
- Mencap (NI)
- National Autistic Society
- NIID
- N.I.U.S.E
- North & West Housing
- Northern Area HSC Trust
- Orchard Grove Residential Home
- Parkanaur College
- Praxis Care Group
- Prospects
- Positive Futures
- Presbyterian Board of Social Witness
- Rethink
- Salvation Army
- South Eastern HSC Trust
- Southern Health and Social Care Trust
- St John of God
- Triangle Housing Association
- Western Area HSC Trust