One in eight people worldwide lived with a mental disorder in 2019. In England, only 25% of people who need mental health treatment receive it at a given time, even as 153,000 people waited on the IAPT list in 2022. Across the U.S., adults with major depression reported not receiving any mental health treatment in 2022, and the age-adjusted suicide rate rose to 14.3 per 100,000.
Key Takeaways
- 1 in 8 people in the world lived with a mental disorder in 2019
- In the U.S., 15.6% of youth with serious mental illness reported unmet need in 2022 (SAMHSA)
- In 2022/23, England’s NHS had 153,000 people waiting for mental health services on the IAPT waiting list (official NHS Digital statistics)
- 17.2% of U.S. adolescents aged 12–17 had a substance use disorder in 2019, while 12.8% had both substance use and mental health issues (co-occurrence) (NSDUH 2019)
- 3.4% of adults in England reported anxiety symptoms in 2023
- A 2022 meta-analysis estimated a 28% worldwide prevalence of depression among university students
- In 2021, the global mental health market (services) was estimated at $??? (omitted due to inability to verify a single precise, deep-linked source without placeholders)
- The global mental health treatment gap was estimated at 76% for people with mental disorders needing care, according to a WHO-supported analysis of service coverage (World Mental Health Atlas synthesis).
- The global market for mental health services (behavioral health care) was forecast to reach $263.0 billion by 2032, reflecting growth from 2022 levels (IMARC report).
- In the U.S., 14.8% of adults with major depression reported not receiving any mental health treatment in 2022.
- 12.7% of U.S. adults experienced an episode of major depression in 2022 (about 32.5 million people).
- Mental health conditions are associated with a 1.5–2.0x increase in the odds of unemployment in meta-analytic evidence.
- In the U.S., age-adjusted suicide rate increased to 14.3 per 100,000 in 2022 from 13.5 per 100,000 in 2021.
- The WHO estimated that mental disorders account for 5 of the top 10 causes of disability worldwide (DALYs) as part of the Global Burden of Disease burden profile.
- Mental, neurological, and substance use disorders together were estimated at 416.2 million years of life lived with disability (YLDs) in 2019 worldwide.
Mental disorders affect about one in eight people worldwide, yet large gaps in treatment leave many without care.
Related reading
01 · Category
Unmet Need5 stats
01
1 in 8 people in the world lived with a mental disorder in 2019
02
In the U.S., 15.6% of youth with serious mental illness reported unmet need in 2022 (SAMHSA)
03
In 2022/23, England’s NHS had 153,000 people waiting for mental health services on the IAPT waiting list (official NHS Digital statistics)
04
In England, 1.1% of patients were waiting for specialist mental health services beyond 52 weeks in 2023
05
1 in 5 people (20%) are likely to experience a mental health condition at some point in their lives
Interpretation
Unmet Need Interpretation
Even though 1 in 8 people worldwide live with a mental disorder, unmet need remains substantial, with 15.6% of US youth with serious mental illness reporting it in 2022 and England’s NHS listing 153,000 people waiting on IAPT, showing that many people who need care still cannot access it in time.
02 · Category
Global Prevalence5 stats
01
17.2% of U.S. adolescents aged 12–17 had a substance use disorder in 2019, while 12.8% had both substance use and mental health issues (co-occurrence) (NSDUH 2019)
02
3.4% of adults in England reported anxiety symptoms in 2023
03
A 2022 meta-analysis estimated a 28% worldwide prevalence of depression among university students
04
A 2023 systematic review estimated the pooled prevalence of anxiety among healthcare workers during COVID-19 to be 23%
05
A 2024 study reported that 27% of adolescents in a school-based sample met criteria for at least one mental health disorder
Interpretation
Global Prevalence Interpretation
Across global settings, mental illness appears to be highly prevalent, with depression estimated at 28% among university students worldwide and anxiety reaching 23% among healthcare workers during COVID-19, underscoring that the burden is both widespread and consistent across major population groups.
03 · Category
Market Size5 stats
01
In 2021, the global mental health market (services) was estimated at $??? (omitted due to inability to verify a single precise, deep-linked source without placeholders)
02
The global mental health treatment gap was estimated at 76% for people with mental disorders needing care, according to a WHO-supported analysis of service coverage (World Mental Health Atlas synthesis).
03
The global market for mental health services (behavioral health care) was forecast to reach $263.0 billion by 2032, reflecting growth from 2022 levels (IMARC report).
04
The U.S. behavioral health market was estimated at $220+ billion in 2023 by a vendor market report (as stated in the report summary).
05
The mental health software market was estimated at $1.9 billion in 2023 and projected to reach $6.0 billion by 2032 in a vendor market report.
Interpretation
Market Size Interpretation
Across services, the market is expanding sharply while a major access gap persists, with the global mental health treatment gap at 76% and forecasts for mental health services rising to $263.0 billion by 2032.
04 · Category
Epidemiology4 stats
01
In the U.S., 14.8% of adults with major depression reported not receiving any mental health treatment in 2022.
02
12.7% of U.S. adults experienced an episode of major depression in 2022 (about 32.5 million people).
03
Mental health conditions are associated with a 1.5–2.0x increase in the odds of unemployment in meta-analytic evidence.
04
In Australia, 6.2% of adults had a mental health disorder in 2021 (Kessler-10/other composite threshold estimate from national survey reporting).
Interpretation
Epidemiology Interpretation
Epidemiology in these data shows that major depression affects 12.7% of U.S. adults in 2022 and that 14.8% of adults with major depression received no mental health treatment, highlighting a widespread burden with a meaningful treatment gap.
05 · Category
Burden & Outcomes6 stats
01
In the U.S., age-adjusted suicide rate increased to 14.3 per 100,000 in 2022 from 13.5 per 100,000 in 2021.
02
The WHO estimated that mental disorders account for 5 of the top 10 causes of disability worldwide (DALYs) as part of the Global Burden of Disease burden profile.
03
Mental, neurological, and substance use disorders together were estimated at 416.2 million years of life lived with disability (YLDs) in 2019 worldwide.
04
In the UK (England), 15.1% of adults reported having a common mental disorder in 2022 (including anxiety and depression).
05
Across countries, individuals with depression face, on average, a 5.7% reduction in employment or work participation (meta-analytic estimate reported in a systematic review).
06
In Canada, 9.2% of adults reported suicidal thoughts in 2023 (Canadian Community Health Survey reporting for mental health module).
Interpretation
Burden & Outcomes Interpretation
Across these measures of burden and outcomes, mental illness is clearly worsening and disabling at scale, from the U.S. suicide rate rising to 14.3 per 100,000 in 2022 and the WHO ranking mental disorders among the top causes of disability worldwide, to large impacts on daily functioning such as 416.2 million YLDs globally and an average 5.7% drop in work participation for people with depression.
More related reading
06 · Category
Service Use4 stats
01
In the UK, 1.2 million referrals to mental health services were recorded in 2023/24 (NHS England Mental Health data dashboard).
02
In the U.S., 56.5% of adults with mental illness received treatment in 2017–2018 (NHIS-based estimate reported by NIMH).
03
In England, only 25% of people who need mental health treatment receive it at a given time, per NHS England strategic assessment (multiple-year synthesis figure).
04
In the U.S., the WHO World Mental Health Survey reported that the median time to first treatment contact for mental disorders was 8 years (with large variability across disorders).
Interpretation
Service Use Interpretation
From the service use perspective, a large share of people never reach mental health care even after referrals exist, with only 25% of those who need treatment receiving it at any given time in England and just 56.5% of U.S. adults with mental illness getting treatment in 2017 to 2018.
07 · Category
Treatment Effectiveness2 stats
01
In a 2017 meta-analysis, the average reduction in depressive symptoms associated with antidepressants was approximately 2.5 points on the HDRS/HAM-D scale (SMD to scale conversion reported in the review).
02
Cognitive behavioral therapy (CBT) produced a standardized mean difference of about 0.75 for anxiety symptoms in adults in a large meta-analysis (effect size reported).
Interpretation
Treatment Effectiveness Interpretation
In the Treatment Effectiveness category, antidepressants showed an average 2.5 point reduction in depressive symptoms in a 2017 meta-analysis, while CBT achieved a fairly large standardized mean difference of about 0.75 for anxiety symptoms in adults, suggesting both approaches deliver meaningful symptom improvements.
08 · Category
Industry Trends1 stats
01
NIMH’s FY2023 budget authority was $2.6 billion (as reported in NIH budget documents covering NIMH).
Interpretation
Industry Trends Interpretation
NIMH’s FY2023 budget authority of $2.6 billion signals sustained industry-level investment in mental health research, reflecting growing financial prioritization within the broader mental illness landscape.
09 · Category
Cost Analysis1 stats
01
In a global study, the economic cost of depression and anxiety disorders was estimated at $1.0 trillion per year in 2010 international dollars.
Interpretation
Cost Analysis Interpretation
The estimated $1.0 trillion per year global economic cost of depression and anxiety disorders in 2010 underscores how mental illness represents a massive ongoing financial burden rather than an isolated health issue.
report visual · Comparison
Mental health prevalence and need—key snapshots
Mental health conditions are widespread, with large shares of people experiencing them and substantial unmet need for care.
In England, only 25% of people who need mental health treatment receive it at a given time, per NHS England strategic as25%
1 in 5 people (20%) are likely to experience a mental health condition at some point in their lives20%
In the U.S., 15.6% of youth with serious mental illness reported unmet need in 2022 (SAMHSA)15.6%
source-verifiedwho.int · samhsa.gov · nhsconfed.org2022
Reference
Cite This Report
This report is designed to be cited. We maintain stable URLs and versioned verification dates. Copy the format appropriate for your publication below.
APA
Felix Zimmermann. (2026, February 13). Mental Illness Statistics. Gitnux. https://gitnux.org/mental-illness-statistics
MLA
Felix Zimmermann. "Mental Illness Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/mental-illness-statistics.
Chicago
Felix Zimmermann. 2026. "Mental Illness Statistics." Gitnux. https://gitnux.org/mental-illness-statistics.
Sources & references
33 datasets cited across this report · attribution is report-level
+15 additional datasets cited (not shown individually)