| | Organization Name(s) | Located In |
 | Addiction Services of Thames Valley | London |
 | Addiction Services of Thames Valley, Back On Track Program | London |
 | Addiction Services of Thames Valley, Fresh Start Program | London |
 | Addiction Services of Thames Valley, Heartspace Program | London |
 | Addiction Services of Thames Valley, London CAReS | London |
 | Addiction Services of Thames Valley, Problem Gambling Services - Assessment | London |
 | Addiction Services of Thames Valley, Problem Gambling Services - Treatment | London |
 | Addiction Services of Thames Valley, St Thomas Office | St Thomas |
 | Addiction Services of Thames Valley, Strathroy Office | Strathroy |
 | Addiction Services of Thames Valley, Strathroy Office, Problem Gambling Services - Assessment | Strathroy |
 | Addiction Services of Thames Valley, Strathroy Office, Problem Gambling Services - Treatment | Strathroy |
 | Addiction Services of Thames Valley, Strathroy Office, Substance Abuse Services - Assessment | Strathroy |
 | Addiction Services of Thames Valley, Strathroy Office, Substance Abuse Services - Treatment | Strathroy |
 | Addiction Services of Thames Valley, Substance Abuse Services - Assessment | London |
 | Addiction Services of Thames Valley, Substance Abuse Services - Treatment | London |
 | Addiction Services of Thames Valley, Supportive Housing for Addictions | London |
 | Addiction Services of Thames Valley, Walk-in Intake for Substance Abuse Concerns | London |
| | Bluewater Methadone Clinic - Chatham Site | Chatham |
 | Brentwood Recovery Home | Windsor Central |
 | Brentwood Recovery Home, Junior Youth Group | Windsor Central |
 | Brentwood Recovery Home, Men's Program | Windsor Central |
 | Brentwood Recovery Home, Women's Program | Windsor Central |
 | Chatham-Kent Mental Health and Addictions Program, C-K MHAP | Chatham |
| | ConnexOntario, Drug and Alcohol Registry of Treatment | London |
| | Drug and Alcohol Treatment Registry, Problem Gambling Helpline - OPGH, Mental Health Service Information Ontario | Ontario |
 | Elgin Counselling and Mediation Centre | St Thomas |
 | Goyeau Street Clinic | Windsor |
 | House of Sophrosyne | Windsor West |
 | House of Sophrosyne, HEROS program | Windsor West |
| | Integrity Drug Screening and Analysis Inc | Windsor East |
 | John Howard Society of Windsor-Essex County, Juvenile Drug, Alcohol and Self Management Group | Windsor Central |
| | Narcotics Anonymous | Chatham |
| | Narcotics Anonymous - London | London |
 | On Your Own - a Youth Survival Guide, A Directory of Services for Youth | Chatham |
 | Ontario Addiction Treatment Centres, Windsor Clinic | Windsor West |
 | Renew Medical Clinics, Leamington Clinic | Leamington |
 | Robert Goulard Counselling Service | Windsor Central |
 | Salvation Army (The), Community and Rehabilitation Centre, Day Program for Addictions, Windsor | Windsor Central |
 | Salvation Army (The), Community and Rehabilitation Centre, Men's Addiction Support and Treatment, Windsor | Windsor Central |
 | Salvation Army (The) - London, Correctional and Justice Services | London |
 | Salvation Army (The) - London, Correctional and Justice Services, Addiction Education Program | London |
 | Salvation Army (The) - London, Correctional and Justice Services, Community Alternatives for Youth - St Thomas | St Thomas |
 | Teen Challenge London | London |
 | Turning Point Incorporated | London |
 | Turning Point Incorporated, Men's Residence | London |
 | Turning Point Incorporated, Women's Residence | London |
 | Walpole Island Community Service Program, Bkejwonong First Nation | Walpole Island |
 | Walpole Island First Nation | Wallaceburg |
 | Walpole Island Primary Chemical Prevention Program, Wallaceburg | Walpole Island |
 | Westover Treatment Centre, Thamesville | Thamesville |
 | Windsor-Essex County Health Unit, Essex Satellite Office | Essex (Town of) |
 | Windsor Regional Hospital, Tafour Campus, Family Mental Health and Addictions, Concurrent Disorders Treatment Program | Windsor West |
 | Windsor Regional Hospital, Tayfour Campus, Family Mental Health & Addictions Services, Windsor Addictions Assessment & Outpatient Services | Windsor West |
 | Windsor Regional Hospital, Western Campus, Family Mental Health & Addictions Services, Withdrawal Management Services | Windsor West |
| | Women for Sobriety | Windsor |