41 Mental Health Statistics: Prevalence, Treatment & Trends (2026)
Up-to-date mental health statistics for 2026 covering prevalence rates, treatment gaps, demographic trends, and the state of mental health in America. Sourced from SAMHSA, CDC, NIMH, and WHO.
Mental health conditions are among the most common health concerns in the United States and worldwide. Whether you are researching your own symptoms, supporting a loved one, or simply trying to understand the scope of the problem, having accurate data matters.
This page compiles 41 key mental health statistics from authoritative sources including the Substance Abuse and Mental Health Services Administration (SAMHSA), the Centers for Disease Control and Prevention (CDC), the National Institute of Mental Health (NIMH), and the World Health Organization (WHO). All figures reflect the most recent data available as of early 2026.
Looking for statistics on therapy effectiveness and outcomes? See our companion page on therapy statistics.
Overall Mental Health Prevalence
The numbers paint a clear picture: mental health conditions are widespread, affecting people across every demographic group.
59.3 million
1. One in five U.S. adults has a mental illness. In 2023, an estimated 59.3 million adults aged 18 or older (23.1% of the adult population) had any mental illness (AMI) in the past year. AMI includes conditions ranging from mild anxiety to severe depression, bipolar disorder, and schizophrenia (SAMHSA, 2024 National Survey on Drug Use and Health).
2. Serious mental illness affects 5.5% of U.S. adults. Approximately 14.1 million adults had a serious mental illness (SMI) in 2023 — conditions that substantially interfere with or limit major life activities. This includes severe major depressive disorder, schizophrenia, and bipolar disorder (SAMHSA, 2024 NSDUH).
3. More than 1 billion people globally have a mental health disorder. The WHO estimates that roughly 1 in 8 people worldwide (approximately 970 million people as of 2019, now exceeding 1 billion) lives with a mental disorder. Anxiety and depression account for the largest share (WHO, 2025 World Mental Health Report update).
4. Women are more likely than men to experience mental illness. Among U.S. adults, 27.2% of women had any mental illness in 2023 compared with 18.1% of men. This disparity holds across most specific conditions, particularly anxiety and depression (SAMHSA, 2024 NSDUH).
5. Young adults ages 18-25 have the highest prevalence. An estimated 36.2% of young adults aged 18 to 25 experienced any mental illness in 2023, compared with 28.1% of adults aged 26 to 49, and 14.4% of adults aged 50 and older (SAMHSA, 2024 NSDUH).
Anxiety Statistics
Anxiety disorders are the most common category of mental illness in the United States. They include generalized anxiety disorder (GAD), social anxiety disorder, panic disorder, and specific phobias.
19.1%
6. 19.1% of U.S. adults experienced an anxiety disorder in the past year. That translates to approximately 49 million adults. Anxiety disorders are more common in women (23.4%) than men (14.3%) (NIMH).
7. 31.1% of U.S. adults will experience an anxiety disorder at some point in their lifetime. Nearly one in three adults will meet criteria for at least one anxiety disorder during their life (NIMH, National Comorbidity Survey Replication).
8. The 2024 NSDUH measured GAD for the first time, finding 21.7% of adults reported GAD symptoms. This was the first year SAMHSA included generalized anxiety disorder as a standalone measure, and the results confirmed what clinicians have long suspected: GAD is far more prevalent than previously documented by survey data alone (SAMHSA, 2024 NSDUH preliminary data).
9. Social anxiety disorder affects 7.1% of U.S. adults. An estimated 15 million adults live with social anxiety disorder, with the typical age of onset being around 13 years old. Despite its prevalence, people with social anxiety wait an average of 10 years before seeking help (ADAA; NIMH).
10. Panic disorder affects 2.7% of U.S. adults annually. Approximately 6 million adults experience panic disorder in a given year. Women are twice as likely as men to develop it (NIMH).
11. Specific phobias are the single most common anxiety disorder. An estimated 12.5% of U.S. adults will experience a specific phobia at some point in their lives, with 9.1% experiencing one in any given year (NIMH, NCS-R).
Depression Statistics
Depression is one of the leading causes of disability worldwide and a major contributor to the global burden of disease.
21.4%
12. 19% of U.S. adults have ever been diagnosed with depression. Nearly one in five adults reports receiving a depression diagnosis at some point in their lives (CDC Behavioral Risk Factor Surveillance System, 2023).
13. 21.4% of adults experienced depressive symptoms in the past two weeks. Based on the PHQ-8 screening tool, more than one in five adults reported at least mild depressive symptoms during their most recent two-week period (CDC National Health Interview Survey, 2024).
14. Major depressive disorder affects 8.4% of U.S. adults annually. An estimated 21.5 million adults had at least one major depressive episode (MDE) in 2023. This represents 8.4% of all U.S. adults (SAMHSA, 2024 NSDUH).
15. Depression disproportionately affects young adults. Among adults aged 18 to 25, 18.6% had a major depressive episode in 2023, compared with 9.8% of those aged 26 to 49, and 4.6% of those 50 and older (SAMHSA, 2024 NSDUH).
16. Women experience depression at roughly twice the rate of men. In 2023, 10.3% of adult women had a major depressive episode compared with 6.2% of adult men. Researchers attribute this gap to a combination of biological, hormonal, and sociocultural factors (SAMHSA, 2024 NSDUH).
17. Depression is the leading cause of disability worldwide. The WHO ranks depression as the single largest contributor to global disability, ahead of heart disease and cancer. It affects more than 280 million people globally (WHO, 2025).
PTSD Statistics
Post-traumatic stress disorder (PTSD) develops after exposure to a traumatic event. While many people experience trauma, only a subset develops PTSD.
6%
18. About 6% of the U.S. population will develop PTSD during their lifetime. That translates to roughly 20 million Americans. At any given time, about 12 million adults are living with PTSD (National Center for PTSD).
19. 3.6% of U.S. adults had PTSD in the past year. In any 12-month period, approximately 9 million adults meet criteria for PTSD (National Center for PTSD; NIMH).
20. Women develop PTSD at approximately twice the rate of men. An estimated 8% of women will develop PTSD in their lifetime compared with 4% of men. This difference is attributed in part to higher rates of sexual assault and interpersonal violence experienced by women (National Center for PTSD).
21. Among veterans, PTSD rates range from 11% to 20%. The prevalence varies by service era: 11-20% of veterans who served in Operations Iraqi Freedom and Enduring Freedom have PTSD in a given year. For Vietnam veterans, the National Vietnam Veterans Readjustment Study found a lifetime prevalence of approximately 30% (U.S. Department of Veterans Affairs).
22. Roughly 60% of men and 50% of women experience at least one trauma in their lifetime. Experiencing trauma is common, but developing PTSD is not inevitable. Factors including the type of trauma, social support, and individual resilience influence who develops the disorder (National Center for PTSD).
Other Conditions: OCD, Eating Disorders, Bipolar, BPD, and Co-Occurring Substance Use
Mental health encompasses far more than anxiety and depression. Here are prevalence figures for several other significant conditions.
23. OCD affects approximately 1.2% of U.S. adults. An estimated 2 to 3 million adults live with obsessive-compulsive disorder. OCD is equally common in men and women, with average onset in the late teens to early twenties (NIMH).
24. Eating disorders affect roughly 9% of the U.S. population over their lifetime. That includes anorexia nervosa, bulimia nervosa, and binge eating disorder. Eating disorders have the highest mortality rate of any mental illness, with one death every 52 minutes attributable to an eating disorder (ANAD; Deloitte Access Economics, 2020).
25. Bipolar disorder affects 2.8% of U.S. adults. Approximately 7.2 million adults live with bipolar disorder. The median age of onset is 25 years, though it can emerge in adolescence or later in adulthood (NIMH).
26. Borderline personality disorder (BPD) affects an estimated 1.4% of adults. BPD is characterized by instability in relationships, self-image, and emotions. Recent research suggests it may be more prevalent than earlier estimates indicated, and effective treatments like dialectical behavior therapy (DBT) have significantly improved outcomes (NIMH; NAMI).
27. 9.5 million U.S. adults have co-occurring mental illness and substance use disorder. In 2023, roughly 21.5 million adults had a substance use disorder, and 9.5 million of them also had a co-occurring mental illness. This dual diagnosis complicates treatment and often requires integrated care (SAMHSA, 2024 NSDUH).
Youth Mental Health
Mental health challenges among children and adolescents have received increased attention in recent years, with several indicators suggesting a crisis that began before the COVID-19 pandemic and has been slow to resolve.
40%
28. 40% of high school students reported persistent feelings of sadness or hopelessness. This represents students who felt so sad or hopeless almost every day for two or more weeks that they stopped doing some usual activities. The rate was 57% for female students and 29% for male students (CDC YRBS, 2023).
29. 18% of adolescents aged 12-17 had a major depressive episode in the past year. In 2023, approximately 4.7 million adolescents experienced at least one major depressive episode (SAMHSA, 2024 NSDUH).
30. 20% of children and adolescents have a diagnosable anxiety disorder. Anxiety disorders are the most common mental health conditions among youth, with separation anxiety, social anxiety, and generalized anxiety being the most prevalent subtypes (CDC; NIMH).
31. LGBTQ+ youth face significantly elevated risk. According to the Trevor Project's 2024 National Survey, 39% of LGBTQ+ young people (ages 13-24) seriously considered suicide in the past year. Transgender and nonbinary youth reported even higher rates. Among LGBTQ+ youth, 58% reported symptoms of anxiety and 48% reported symptoms of depression (The Trevor Project, 2024).
32. Suicide is the second leading cause of death for people aged 10-24. In 2022, 6,637 people aged 10 to 24 died by suicide in the United States. The suicide rate among this age group increased 62% between 2007 and 2022 (CDC WISQARS).
The Treatment Gap
Despite the availability of effective treatments, the majority of people with mental health conditions do not receive care. This treatment gap is one of the most pressing public health challenges.
54.7%
33. 54.7% of adults with mental illness received no treatment. More than half of the estimated 59.3 million adults with any mental illness in 2023 did not receive mental health services. That leaves roughly 32.4 million adults untreated (SAMHSA, 2024 NSDUH).
34. 60% of adolescents with major depression did not receive treatment. Among the 4.7 million adolescents who had a major depressive episode in 2023, approximately 60% received no mental health treatment (SAMHSA, 2024 NSDUH).
35. Significant racial and ethnic disparities exist in treatment access. Among adults with any mental illness in 2023, treatment rates varied: 52.4% of White adults received services, compared with 37.1% of Black adults, 35.1% of Hispanic adults, and 25.4% of Asian adults. Barriers include cost, stigma, language, cultural factors, and provider shortages (SAMHSA, 2024 NSDUH).
36. Cost is the most cited barrier to treatment. According to SAMHSA data, 42% of adults with unmet mental health needs cited cost or lack of insurance as the primary reason for not receiving care. Other barriers include not knowing where to find services (24%), believing they could handle the problem without treatment (22%), and concerns about stigma (14%) (SAMHSA, 2024 NSDUH). For guidance on affording care, see our guide on how much therapy costs and does insurance cover therapy.
37. There is a severe shortage of mental health providers. Over 160 million Americans live in federally designated Mental Health Professional Shortage Areas. The Health Resources and Services Administration (HRSA) estimates the U.S. needs an additional 10,000 mental health practitioners to meet current demand (HRSA, 2024).
Trends Over Time
Understanding how mental health has changed over time helps put current numbers in context.
38. Mental illness prevalence has been rising since 2019. The percentage of U.S. adults with any mental illness increased from 19.1% in 2019 to 23.1% in 2023. While some of this increase reflects greater awareness and willingness to report symptoms, the overall trend appears to be a genuine increase in prevalence, accelerated by the COVID-19 pandemic (SAMHSA, 2020-2024 NSDUH comparisons).
39. COVID-19 had a measurable impact on mental health. During the pandemic, global prevalence of anxiety and depression increased by an estimated 25-27% in the first year alone. In the United States, the proportion of adults reporting symptoms of anxiety or depression jumped from 11% in early 2019 to over 40% by late 2020 (WHO, 2022; CDC Household Pulse Survey).
40. Youth major depressive episodes declined from 20.8% to 15.4% between 2021 and 2024. In a rare positive development, the rate of past-year major depressive episodes among adolescents aged 12-17 dropped significantly over this three-year period. Researchers point to expanded access to telehealth, increased school-based mental health programs, and destigmatization as contributing factors, though more analysis is needed (SAMHSA, 2024 NSDUH).
Global Perspective
Mental health is a worldwide challenge, and the burden extends far beyond individual suffering.
41. Mental health conditions cost the global economy over $1 trillion annually in lost productivity. Depression and anxiety alone account for the majority of this figure, through absenteeism, presenteeism (working while unwell), and early departure from the workforce. The WHO estimates that every $1 invested in treatment for common mental disorders returns $4 in improved health and productivity (WHO; The Lancet Psychiatry Commission, 2024).
Beyond the economic toll, these global figures add context:
- Depression is the leading cause of disability worldwide and a major contributor to the overall global burden of disease (WHO, 2025).
- Close to 800,000 people die by suicide every year globally, making it the fourth leading cause of death among 15-29 year olds (WHO, 2025).
- Low- and middle-income countries bear a disproportionate burden, with over 75% of people with mental disorders in these countries receiving no treatment at all (WHO Mental Health Atlas, 2024).
- The global mental health workforce is severely strained, with fewer than 2 mental health workers per 100,000 people in low-income countries, compared with over 70 per 100,000 in high-income countries (WHO Mental Health Atlas, 2024).
How to Use These Statistics
These numbers serve several practical purposes:
- If you are considering therapy, they can help normalize the experience. Mental health conditions are common, treatable, and nothing to be ashamed of. Explore our guide on what to expect in your first therapy session.
- If you are supporting someone, understanding prevalence can help you recognize that your loved one is not alone. See our guide on signs someone needs therapy.
- If you are a professional or researcher, we have cited primary sources throughout so you can verify and build on these figures.
For statistics focused specifically on therapy outcomes and effectiveness, visit our therapy statistics page.
The primary sources are the SAMHSA National Survey on Drug Use and Health (NSDUH), the CDC National Health Interview Survey (NHIS) and Youth Risk Behavior Survey (YRBS), the NIMH, and the WHO World Mental Health Report. We also reference the National Comorbidity Survey Replication (NCS-R), the Trevor Project's annual surveys, and peer-reviewed research published in journals such as The Lancet Psychiatry.
SAMHSA publishes NSDUH data annually, typically with a one-year lag (e.g., 2023 data published in late 2024). The CDC YRBS is conducted every two years. WHO global estimates are updated periodically. We review and update this page as new data becomes available.
Variations arise from differences in methodology, survey populations, time frames (past year vs. lifetime), and diagnostic criteria used. For example, SAMHSA surveys households while the CDC NHIS uses a different sampling frame. We note the specific source and time frame for each statistic to help you compare accurately.
Both factors are at play. Greater awareness, reduced stigma, and expanded screening have increased detection and self-reporting. However, multiple independent data sources — including emergency department visits, suicide rates, and clinical diagnoses — confirm that genuine increases in prevalence have occurred, particularly among adolescents and young adults since 2010.
SAMHSA defines 'any mental illness' (AMI) as a diagnosable mental, behavioral, or emotional disorder of any severity. 'Serious mental illness' (SMI) is a subset of AMI that substantially interferes with or limits one or more major life activities. SMI includes conditions like severe major depression, schizophrenia, and bipolar I disorder with functional impairment.