Mental Illness in the United States: Prevalence and Treatment
National Institute of Mental Health (NIMH) · NIMH Statistics — U.S. Department of Health & Human Services
NIMH's annual statistical summary on how many U.S. adults and adolescents live with a mental illness, how many receive treatment, and where the largest gaps are.
- An estimated 1 in 5 U.S. adults (~59 million people) live with a mental illness in a given year.
- Only about half of adults with any mental illness received mental health services in the past year.
- Treatment rates are lowest among young adults (18–25), despite that group having the highest prevalence.
- Serious mental illness (SMI) affects roughly 5.5% of adults and is more likely to require higher levels of care.
Why it matters
These numbers are the baseline for understanding why higher levels of care — including residential treatment — exist. They also show where families most often fall through the cracks before residential ever becomes part of the conversation.
Limitations
NIMH statistics are population-level estimates drawn from federal surveys; they describe the size of the problem but not which level of care is most effective for any individual.
Original source
See an error or have a better source? Suggest a correction.
SAMHSA's National Helpline
For free, confidential information and referrals to local treatment options — not affiliated with this site.
Call 1-800-662-HELP (4357)In an immediate mental health crisis, call or text 988.