| | Organization Name(s) | Located In |
 | ABA Autism Services Niagara | Niagara Falls |
 | Anne Smithson Counselling Services, Specialize in Cognitive Behavioral Therapy | Crystal Beach |
 | Anxiety Disorders Association of Ontario | Ottawa |
 | Bridges Community Health Centre, Fort Erie | Fort Erie |
 | Bridges Community Health Centre, Port Colborne | Port Colborne |
 | Canadian Mental Health Association Niagara Branch, Administration | St Catharines |
 | Canadian Mental Health Association Niagara Branch, Community Crisis Care/Safe Bed Program | St Catharines |
 | Canadian Mental Health Association Niagara Branch, Community Support Program | Port Colborne |
 | Canadian Mental Health Association Niagara Branch, Fort Erie Satellite Office | Fort Erie |
 | Canadian Mental Health Association Niagara Branch, Mental Health Homelessness Initiative, Phase II Housing | St Catharines |
 | Canadian Mental Health Association Niagara Branch, Renewed Employment Access Link, REAL Work Employment Development Program, Niagara Falls | Niagara Falls |
 | Canadian Mental Health Association Niagara Branch, Renewed Employment Access Link, REAL Work Employment Development Program, St Catharines | St Catharines |
 | Canadian Mental Health Association Niagara Branch, Renewed Employment Access Link, REAL Work Employment Development Program, Welland | Welland |
 | Canadian Mental Health Association Niagara Branch, Renewed Employment Access Link, REAL Work Employment Development Program, Fort Erie | Fort Erie |
 | Canadian Mental Health Association Niagara Branch, Residential/Community Support Program | St Catharines |
 | Canadian Mental Health Association Niagara Branch, Resource Centre, Niagara Falls | Niagara Falls |
 | Canadian Mental Health Association Niagara Branch, Resource Centre, St Catharines | St Catharines |
 | Centre for Addiction and Mental Health, Information Desk | Toronto (City of) |
 | Chabad Lubavitch Jewish Discovery Center, Noah's Line | St Catharines |
| | Childrens Mental Health Network | Welland |
| | COAST Niagara, Crisis Outreach and Support Team | Niagara Region |
 | Cognitive Behavioural Therapy Centre of Niagara (CBT Niagara), Susan Chudzik-Sipos, Registered Psychological Associate | St Catharines |
| | ConnexOntario Health Services Information, Mental Health Helpline | London |
 | Consumer/Survivor Initiative of Niagara | Welland |
 | Contact Brant For Children's and Developmental Services | Brantford |
| | Creative Counselling, Creative strength-based approaches for children, adolescents, and adults | St Catharines |
 | David James and Associates Professional Counselling Services | Beamsville |
| | Dawn Shickluna (MA, MEd) Counselling and Consulting Services | St Catharines |
| | Family Mental Health Support Network of Niagara | St Catharines |
 | Gateway Residential and Community Support Services of Niagara Inc | Welland |
 | Goodwill Industries Niagara, Workforce Development Programs, Ontario Disability Support Program, Ontario Works | St Catharines |
 | Hamilton Health Sciences, McMaster Children's Hospital | Hamilton West |
 | Healthy Living Niagara | St Catharines |
 | Homewood Health Centre | Guelph-Eramosa |
| | Katharine Somogyvari, Specializing in Cognitive Behavioural Therapy (CBT) | St Catharines |
| | Leverage U | St Catharines |
 | McGillivray & Associates, OT4KIDS | St Catharines |
 | Montebello Place Inc, Homes for Special Care, Group Home | St Catharines |
| | Mood Disorder Support Group of the Niagara Region | St Catharines |
 | Mutual Support Systems of the Niagara Region | Fenwick |
 | National Eating Disorder Information Centre | Toronto (City of) |
 | Niagara Family Therapy | St Catharines |
 | Niagara Health System, Greater Niagara General Site, Mental Health Services | Niagara Falls |
 | Niagara Health System, Port Colborne Site, Niagara Eating Disorder Outpatient Program | Port Colborne |
 | Niagara Health System, St Catharines Site, Mental Health Services | St Catharines |
 | Niagara Health System, Welland Site, Mental Health Services | Welland |
 | Niagara Health System, Welland Site, Out-Patient Mental Health Clinic | Welland |
 | Niagara Neuropsychology Service & Niagara Psychology Service | Grimsby |
 | Niagara. Region Public Health, Main Office | Thorold |
 | Niagara. Region Public Health, Niagara Falls Branch | Niagara Falls |
 | Niagara. Region Public Health, Niagara Region Mental Health | Thorold |
 | Niagara. Region Public Health, Welland Branch | Welland |
 | Oak Centre | Welland |
 | Oak Centre, Lake House, Port Colborne | Port Colborne |
 | Oak Centre, Transitional Employment | Welland |
 | Obsessive-Compulsive Disorder Self Help Group | St Catharines |
 | Ontario Psychotherapy Counselling and Associates | St Catharines |
 | Ontario. Ministry of Children and Youth Services, Child and Parent Resource Institute (CPRI) | London |
 | Ontario. Ministry of the Attorney General, Victims and Vulnerable Persons Division, Office of the Children's Lawyer | Toronto (City of) |
 | Pathstone Mental Health, Schmon Parkway, Mobile Intensive Treatment Team (MITT) and Family Preservation Program (FPP) | Thorold |
 | Pathstone Mental Health, Schmon Parkway Site, Administration | Thorold |
 | Pathstone Mental Health, Schmon Parkway Site, Clinical Assessment Services | Thorold |
 | Pathstone Mental Health, Schmon Parkway Site, Crisis Services | Thorold |
 | Pathstone Mental Health, Schmon Parkway Site, High Risk Services | Thorold |
 | Pathstone Mental Health, Schmon Parkway Site, Psycho-Educational Assessments | Thorold |
 | Pathstone Mental Health, Schmon Parkway Site, Residential Services (Residential Treatment) | Thorold |
 | Pathstone Mental Health, Welland Site | Welland |
 | Pathstone Mental Health, Welland Site, Children and Youth Groups | Welland |
 | Pathstone Mental Health, Welland Site, Counselling Services | Welland |
 | Pathstone Mental Health, Welland Site, Day Treatment Services | Welland |
 | Quest Community Health Centre | St Catharines |
 | Saint Elizabeth Health Care, Hamilton, Niagara, Haldimand-Norfolk, Brant and Burlington | Hamilton Mountain East |
 | Schizophrenia Society of Ontario, Niagara Chapter | St Catharines |
 | Sherry Campbell Counselling Group | Jordan |
 | Skerrett Psychology Professional Corporation | Fort Erie |
 | St Joseph's Healthcare Hamilton, West 5th Campus, Schizophrenia and Community Integration Service, Homes for Special Care Program | Hamilton Mountain West |
 | Start Me Up Niagara | St Catharines |
 | Wendigo Lake Expeditions Inc, Project Dare | South River |
 | Wendy Bulthuis Counselling, Individual, Couple and Family Therapy, Consultation and Assessment | St Catharines |
 | West Niagara Mental Health Program | Grimsby |
 | Your Life Counts | Welland |
| | Youth Advance Consulting Services | Welland |