How many rehab centers are in the United States, and where are they? To answer with the freshest numbers available, we analyzed SAMHSA’s 2024 National Substance Use and Mental Health Services Survey — the federal government’s most recent facility-by-facility count of the nation’s treatment system. It identifies nearly 17,800 substance use treatment facilities nationwide.
But here’s what most “states with the most rehabs” lists get wrong: They rank states by raw facility count, which mostly just measures population. When we recalculated the rankings by facilities per 100,000 residents — the number that actually reflects your odds of finding help nearby — the leaderboard flipped. Several of the states you’d expect to lead turn out to be near the bottom for access.
Below, we break down the states with the most rehab centers by raw count and per capita, show where opioid-treatment and detox access is thinnest and explain how to use any of it to find help.
How Many Rehab Centers Are in the United States?
According to the 2024 N-SUMHSS, there are nearly 17,800 substance use treatment facilities across the country — up from roughly 14,500 a few years earlier. They range from outpatient programs to residential and hospital-based care. SAMHSA contacted 23,948 eligible facilities and 21,205 responded, a 90.4% response rate, making this the most complete national picture available.
The system has also been shifting. Our analysis of the 2024 data found about 2,289 opioid treatment programs (OTPs) — the specialized clinics that dispense methadone — and that just over half of all facilities (about 53%) now offer buprenorphine, a medication for opioid use disorder that became far easier to prescribe after federal rules loosened in 2023. If you want to talk through options at any point, you can reach the National Rehab Hotline at 866-210-1303.
States With the Most Rehab Centers by Raw Count
By sheer number of facilities, the biggest states lead, which is exactly why raw count is a misleading way to judge access. Based on our analysis of the 2024 N-SUMHSS, the top 10 states are:
- California. 1,501 facilities
- New York. 828
- Ohio. 738
- Florida. 693
- Illinois. 649
- Kentucky. 593
- Pennsylvania. 588
- Maryland. 568
- Texas. 564
- Arizona. 540
Notice that Kentucky and Maryland crack the top 8 despite much smaller populations — an early hint that population isn’t the whole story. And older rankings that put Texas near the top are out of date: In the 2024 data, Texas ranks 9th by raw count.
The Better Question: Which States Have the Most Rehab Access?
A state can have many facilities and still be hard to get help in if it also has a large population. Facilities per 100,000 residents is the more honest measure. Pairing the 2024 facility data with U.S. Census Bureau 2024 population estimates, the access leaderboard looks very different.
Most Rehab Access (Facilities per 100,000 Residents)
- Kentucky. 12.9 per 100k
- Alaska. 12.2
- Maine. 10.8
- Wyoming. 9.5
- Maryland. 9.1
Kentucky — hit hard by the opioid crisis and an early Medicaid-expansion state — leads the nation, with more than three times the per-capita access of California.
Least Rehab Access (Facilities per 100,000 Residents)
- Texas. 1.8 per 100k (lowest in the nation)
- South Carolina. 1.9
- Alabama. 2.8
- Florida. 3.0
- Georgia. 3.1
The most striking finding: The states with the highest raw counts are among the worst for access. California ranks 46th per capita, New York 42nd, Florida 48th and Georgia 47th — and Texas, with the 9th-most facilities overall, comes in last at 51st, behind all 49 other states and the District of Columbia. A person in Texas has the lowest per-capita treatment access in the country, despite living in a state with one of the largest raw facility counts.
Where Opioid and Detox Care Is Hardest to Find
Beyond total facilities, two specific services shape whether people can actually start treatment.
Methadone Clinics Cluster in the Northeast
Opioid treatment programs — the clinics certified to dispense methadone — are concentrated in the Northeast and scarce across the rural West. Maine (2.3 per 100k), Maryland (2.1) and Delaware (2.0) have the most OTP access, while Wyoming (0.17), Montana (0.18) and Nebraska (0.20) have the least — a more than tenfold gap. For someone in a rural state, the nearest methadone clinic can be hours away.
Detox Is a National Bottleneck
Detox is often the first step of treatment, yet only about 19% of substance use facilities — roughly 3,000 nationwide — offer it. That scarcity means that even in states with many programs, the specific service someone needs to begin recovery can be hard to reach. It’s one reason a referral line that tracks local availability can be so useful in finding an open door.
Why Rehab Availability Varies So Much by State
Three forces drive these imbalances:
- Population versus need. Larger states have more facilities overall, but less-populated states with high addiction rates often lack proportional resources — and raw counts hide that gap.
- Medicaid expansion and state funding. States that expanded Medicaid generally fund more facilities serving people with low incomes; states that rely on private pay leave more people without affordable options.
- Urban concentration. Most facilities cluster in cities, so people in rural areas may drive hours to the nearest residential program or methadone clinic.
Quality vs. Quantity: How to Choose a Facility
A high ranking doesn’t guarantee you’ll find the right fit. When evaluating options:
- Look for accreditation from CARF or the Joint Commission.
- Ask about evidence-based care — medication-assisted treatment, trauma-informed therapy and co-occurring mental health (dual-diagnosis) support.
- Confirm insurance and payment up front — not every facility accepts Medicaid, and some require payment in advance.
- Be cautious with out-of-state “luxury” facilities, and verify accreditation and outcomes rather than marketing.
How to Find Help Wherever You Live
Your state’s ranking matters less than finding a program that fits you. Whether you’re in Kentucky or Texas, the right next step is the same: Talk to someone who can point you toward vetted options in your area. The National Rehab Hotline can connect you with information, guidance and referrals to treatment options near you. Call 866-210-1303 — free, confidential and available 24/7, 365 days a year. For a medical emergency, call 911; if you’re in emotional crisis, call or text the 988 Suicide & Crisis Lifeline.
Frequently Asked Questions
- Which State Has the Most Rehab Centers? By raw number, California has the most — about 1,501 substance use treatment facilities in SAMHSA’s 2024 data — followed by New York and Ohio. But measured per capita, Kentucky leads the nation.
- Does Having More Rehab Centers Mean Better Access? Not necessarily. Big states like California, Florida and Texas have high raw counts but rank near the bottom for facilities per 100,000 residents. Texas has the lowest per-capita access of any state.
- How Many Rehab Centers Are in the United States? SAMHSA’s 2024 National Substance Use and Mental Health Services Survey identified nearly 17,800 substance use treatment facilities nationwide, ranging from outpatient to residential and hospital-based care.
- Which States Have the Least Access to Rehab? Per capita, Texas, South Carolina, Alabama, Florida and Georgia have the fewest substance use treatment facilities per resident — even though several of them have large raw facility counts.
- How Do I Find a Good Rehab Near Me? Look for accreditation and evidence-based treatment like medication-assisted treatment, and confirm the facility accepts your insurance. You can also call the National Rehab Hotline at 866-210-1303 for free, confidential referrals to options in your area.
- Where Does This Data Come From? These figures come from SAMHSA’s 2024 National Substance Use and Mental Health Services Survey — the most recent available — and U.S. Census Bureau 2024 population estimates.
A note on the data: Facility counts reflect substance use treatment facilities in SAMHSA’s 2024 N-SUMHSS, and per-capita figures use Census Bureau 2024 population estimates. Facility density measures availability, not capacity or quality — a single facility can be large or small — and survey response rates vary by state.
