OTP, Detox, Psychiatric Hospitals, Sober Living, Drug & Alcohol Rehab & Mental Health in Williamson County

With 7 SAMHSA-listed care providers spread over 3 cities, Williamson County, Illinois can be compared below by care type using services, payment options, and location from FindTreatment.gov. These listings are unrated; verify services, licensing, cost, and availability directly.

Browse the Illinois directory or jump to a city:

Carterville, IL 3 facilities Johnston City, IL 1 facilities Marion, IL 3 facilities

Opioid Treatment Programs in Williamson County

1 provider in Williamson County: Marion

Opioid Treatment Program Centerstone of Illinois, Inc. Marion, IL 62959 SAMHSA-listed

Drug & Alcohol Rehab in Williamson County

5 providers in Williamson County: Carterville, Marion

Rehab Center · non-profit Centerstone of Illinois Carterville, IL 62918 SAMHSA-listed12-step facilitationAbnormal involuntary movement scale Rehab Center · non-profit Centerstone of Illinois Marion, IL 62959 SAMHSA-listed12-step facilitationAbnormal involuntary movement scale Rehab Center · non-profit Shawnee Health Service and Development Carterville, IL 62918 SAMHSA-listedAccepts clients using MAT but prescribed elsewhereAdult men Rehab Center · non-profit Shawnee Healthcare Carterville, IL 62918 SAMHSA-listedAcamprosate (Campral®)Adult men Rehab Center · non-profit Shawnee Healthcare Marion, IL 62959 SAMHSA-listedAcamprosate (Campral®)Adult men

Mental Health Treatment in Williamson County

1 provider in Williamson County: Johnston City

Mental Health Facility · non-profit Johnston City Community Health Center Johnston City, IL 62951 SAMHSA-listedActive duty militaryAdults

How to choose care in Williamson County

A sensible first step is to match the level of care to the need: medically supervised detox, residential or outpatient rehabilitation, an opioid treatment program for medications for opioid use disorder, sober living, or inpatient psychiatric care. Ask what each provider actually offers rather than assuming the category covers it.

Where you can, call each option in Williamson County and confirm services, licensing, cost, insurance, and current openings in writing. No ratings, inspections, or quality scores are published for these SAMHSA listings, so direct confirmation is the surest check.

Frequently asked questions

How many care providers are in Williamson County?
According to the current SAMHSA FindTreatment.gov data, Williamson County, Illinois has 7 listed providers: 1 opioid treatment programs, 0 detox centers, 0 psychiatric hospitals, 0 sober living homes, 5 drug & alcohol rehab, and 1 mental health treatment.
Which cities in Williamson County have care providers?
Carterville, Johnston City, Marion list care providers in the current data. Open a city page for local listings.

Data sources

Sources: SAMHSA FindTreatment.gov. Processing date: 2026-10-08.

Required disclosures

For general information only, not medical advice. This website shares public data and general information. It does not offer medical advice, diagnosis, or treatment guidance, and it cannot replace a consultation with a qualified health care professional.

Independent and unaffiliated. RehabProviders.org is a private, independently run directory. It is not affiliated with, nor endorsed or operated by, the Substance Abuse and Mental Health Services Administration (SAMHSA), the U.S. Department of Health and Human Services, or any government agency. SAMHSA has not reviewed or endorsed this site.

Confirm details before acting. Facility records come from public federal datasets and may lag or contain errors. These listings are unrated; always verify current services, licensing, availability, and cost directly with the provider.

In a crisis, get help now. Call or text 988 to reach the 988 Suicide & Crisis Lifeline, or call the SAMHSA National Helpline at 1-800-662-4357.

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