| | Organization Name(s) | Located In |
 | Abma Counselling Services | Niagara Falls |
| | Al-Anon Family Groups | Niagara Region |
| | Alcohol Babies Anonymous | St Catharines |
| | Alcoholics Anonymous (AA) | St Catharines |
 | Another Perspective Family Centres Inc, St Catharines | St Catharines |
 | ARID Group Homes (Niagara), Fort Erie | Fort Erie |
 | ARID Group Homes (Niagara), Thorold | Thorold |
 | Bellwood Health Services, Inc | Toronto (City of) |
| | Canadian Cancer Society, Smokers' Helpline | Hamilton (City of) |
 | Catalyst Life Coaching & Counselling | St Catharines |
| | Centre for Addiction and Mental Health, Back On Track - Ontario's Remedial Measures Program for Impaired Drivers | Toronto (City of) |
 | Child and Family Counselling - CAFC, Niagara Falls | Niagara Falls |
 | Child and Family Counselling - CAFC, St Catharines | St Catharines |
 | Cognitive Behavioural Therapy Centre of Niagara (CBT Niagara), Susan Chudzik-Sipos, Registered Psychological Associate | St Catharines |
 | Community Addiction Services of Niagara | St Catharines |
| | ConnexOntario Health Services Information, Drug and Alcohol Helpline | London |
| | ConnexOntario Health Services Information, Ontario Problem Gambling Helpline | London |
 | Consumer/Survivor Initiative of Niagara | Welland |
 | Contact Brant For Children's and Developmental Services | Brantford |
 | David James and Associates Professional Counselling Services | Beamsville |
| | Gamblers Anonymous, New Hope | Niagara Falls |
 | Homewood Health Centre | Guelph-Eramosa |
 | Kathryn Walsh and Associates | St Catharines |
 | Lidkea, Stob and Associates, Family Counselling Services | St Catharines |
| | Narcotics Anonymous | St Catharines |
 | Niagara Health System, Ontario Street Site | St Catharines |
 | Niagara Health System, Ontario Street Site, Addiction Services | St Catharines |
 | Niagara Health System, Ontario Street Site, Addiction Services, Branscombe House | St Catharines |
 | Niagara Health System, Ontario Street Site, Addiction Services, Niagara Regional Men's Detoxification Centre | St Catharines |
 | Niagara Health System, Ontario Street Site, Addiction Services, Regional Niagara Women's Detoxification Centre | St Catharines |
 | Niagara Health System, Port Colborne Site, New Port Centre | Port Colborne |
 | Niagara Neuropsychology Service & Niagara Psychology Service | Grimsby |
 | Niagara. Region Public Health, Chronic Disease and Injury Prevention | Thorold |
 | Ontario Addiction Treatment Centres, Niagara Falls Clinic | Niagara Falls |
 | Ontario Lung Association (The), Hamilton Branch, Breathworks Program | Hamilton East |
 | Ontario Psychotherapy Counselling and Associates | St Catharines |
 | Ontario Treatment Rehabilitation and Counselling (ONTRAC) | St Catharines |
 | Open Arms Mission Welland Inc | Welland |
 | Responsible Gaming Resource Centre | Niagara Falls |
 | Segue Clinic, Niagara Falls | Niagara Falls |
 | Segue Clinic, St Catharines | St Catharines |
 | Segue Clinic, Welland | Welland |
| | Sex and Love Addicts Anonymous | St Catharines |
 | Start Me Up Niagara | St Catharines |
 | Wayside Niagara | St Catharines |
 | Wayside Transitional Home | St Catharines |
 | Wendigo Lake Expeditions Inc, Project Dare | South River |
 | Women's Addiction Recovery Mediation | Fort Erie |
 | YMCA of Niagara, Youth Outreach Services, Youth Gambling Awareness Program | St Catharines |