What Percent of the World Is Neurodivergent? 2026 Report

15 min read

Last updated: June 11, 2026

What percent of the world is neurodivergent? The best available estimates, including peer-reviewed work in the British Medical Bulletin, put it at 15% to 20% of the global population: roughly 1.2 to 1.6 billion people.1,24,42 In this report, we share the most current prevalence data overall, by condition, by demographic group, by diagnosis trend, and in the workplace and education. Our data was drawn from the CDC, WHO-affiliated researchers, NIH-indexed studies, and large national surveys, most published between 2021 and 2026.

The figure is a range rather than a single number because “neurodivergent” is not a clinical diagnosis, and the total depends on which conditions are counted. This report counts the six core conditions: autism, ADHD, dyslexia, dyspraxia, dyscalculia, and Tourette’s syndrome. Broader definitions also include OCD and acquired conditions, which push the total higher. What unites the core six is executive function: peer-reviewed models describe a “spiky profile” of cognitive strengths alongside difficulties with planning, organization, and self-management.42

Each figure’s population base appears in its table or the surrounding note, and all 42 sources are listed at the end for verification.

Neurodivergence Statistics: Fast Facts

  • An estimated 15–20% of the world’s population, 1.2 to 1.6 billion people, has a neurodivergent condition.1, 24, 42
  • Applying that range to the U.S. population, roughly 50–67 million Americans of all ages have a neurodivergent condition; 19% of U.S. adults (~50 million) identify as neurodivergent.2, 42
  • 1 in 31 U.S. 8-year-olds (3.2%) was identified with autism in 2022, up from 1 in 150 in 2000.4
  • 11.4% of U.S. children and 6.0% of U.S. adults (15.5 million) have an ADHD diagnosis; roughly 60% of adults worldwide with symptomatic ADHD are undiagnosed.6, 8, 9
  • Dyslexia is the most common neurodivergent condition, affecting an estimated 5–20% of Americans.7, 34
  • People with neurodivergent conditions are employed at far lower rates than peers: 31% in the UK, versus 54.7% for people with disabilities overall.24

Estimated Neurodivergent Share of the Population

Estimate Share of Population Implied Count
Commonly cited clinical range, worldwide (peer-reviewed)1,3,24,42 15–20% 1.23–1.64 billion
U.S. adults who identify as neurodivergent (2025 survey)2 19% ~50 million
Diagnosed-conditions floor, worldwide (autism + ADHD + Tourette’s, deduplicated)4,5,6 ~7–10% ~570–820 million
Broad definition including dyslexic traits (worldwide)7 20%+ 1.6+ billion

No single agency measures neurodivergence as a whole, so the estimates above combine condition-level prevalence studies. Counts assume a world population of 8.2 billion. The strongest single data point is YouGov’s 2025 U.S. survey, in which 19% of American adults said they consider themselves neurodivergent.2 Self-identification and clinical prevalence are different measures, but both now point to somewhere between one in seven and one in five people.

Neurodivergence Rates by Country

Country / Region Autism ADHD Dyslexia Dyspraxia Dyscalculia Tourette’s
United States4, 7, 8, 12, 13, 34 3.2% 11.4% 5–20% ~5% 3–6% 0.3%
United Kingdom11, 31, 33, 34 ~1.0% ~1.4% 5–10% ~5%
Australia31, 33 ~1.0% 8.2%
South Korea31 2.6%
Japan31, 33, 34 ~0.6% ~2.5% 5–6%
Italy34 ~3.2%
Global median / average5, 11, 12, 30, 34, 35 1.0% 8.0% 5–10% ~5% 3–6% 0.3–0.8%

Dashes mark conditions with no reliable national estimate. Figures mix diagnosed counts and estimated prevalence; rates are for children where available, and the UK ADHD figure covers all ages, which partly explains why it runs low. True prevalence is believed to be similar across regions; identification is not. Zeidan and colleagues’ review, the basis of the WHO-cited 1-in-100 autism figure, found estimates ranging from 1.09 to 436 per 10,000 across countries.5 Dyslexia is the exception with a real geographic component: rates run lower in transparent orthographies like Italian (~3.2%) than in English (5–17%), because spelling depth changes how visibly the condition presents.34

Trend in Identification Rate Over Time

Indicator Earlier Rate Latest Rate Change
U.S. autism, 8-year-olds (ADDM)4 0.67% (2000) 3.2% (2022) +380%
U.S. children ever diagnosed with ADHD8,32 7.8% (2003) 11.4% (2022) +46%
U.S. children diagnosed with a learning disability, incl. dyslexia and dyscalculia39 7.9% (2016) 9.2% (2023) +16%
Dyspraxia (DCD)11
Tourette’s syndrome35

No country publishes a year-over-year diagnosis series for dyspraxia or Tourette’s syndrome; both are tracked only through point-in-time surveys, which is why those rows show no trend data. The UK shows the same upward pattern across all ages: recorded autism diagnoses rose 787% between 1998 and 2018.18 Adult identification is climbing fastest of all. By 2023, 6.0% of U.S. adults held an ADHD diagnosis.9

Neurodivergent Prevalence by Condition

Condition % of Population (Global Estimate)
ADHD30 8.0% of children
Autism (ASD)5 ~1.0%
Dyslexia7,34 5–10%
Dyspraxia (DCD)11 ~5% of children
Dyscalculia12 3–6%
Tourette’s syndrome13 0.3% of children

Each row uses the best available global estimate. U.S. diagnosed rates run well above these figures: 11.4% of U.S. children have an ADHD diagnosis, 6.0% of U.S. adults do, and 3.2% of U.S. 8-year-olds are identified as having autism.4,8,9 Summing condition shares overstates the total because conditions cluster in the same individuals, especially autism and ADHD. The table below shows how large that overlap runs.

Co-Occurrence Between Conditions

Overlap Co-Occurrence Rate
ADHD among children with autism14 30–80%
ADHD among adults with autism15 53.9%
Autism traits among people with ADHD14 20–50%
ADHD among people with dyslexia (and vice versa)16 25–40%
Children with ADHD, dyslexia, or dyscalculia who have only one condition17 77.3%

Diagnosed vs. Estimated Undiagnosed

Condition Diagnosed Estimated True Prevalence Share Undiagnosed
ADHD (adults, global)6 2.6% 6.8% ~60%
Tourette’s syndrome (U.S. children)35 0.3% 0.6% ~50%
Autism (U.S. 8-year-olds, identified)4 3.2%
Dyslexia (U.S.)7,34 5–20%
Dyspraxia (children, global)11 ~5%
Dyscalculia (global)12 3–6%

Only ADHD and Tourette’s have measured both sides of the gap: roughly 60% of symptomatic adults with ADHD and 50% of children with Tourette’s are undiagnosed. For adult ADHD, “diagnosed” means meeting full persistent-ADHD criteria; the symptomatic figure counts adults with clinically significant symptoms.6,35 For the remaining conditions, the absence of data is itself the finding. Dyslexia may affect up to 20% of the population while only a minority is ever identified in school, and dyspraxia and dyscalculia have no national diagnosis registries at all.7 Autism carries a large legacy of undiagnosed adults. UK recorded diagnoses rose 787% over 20 years while underlying prevalence is believed stable, so most of that growth is previously missed cases finally surfacing.18

Neurodivergent Prevalence by Demographics

Age Group Autism ADHD Dyslexia Dyspraxia Dyscalculia Tourette’s
Children4, 7, 8, 11, 12, 13, 34 3.2% 11.4% 5–20% ~5% 3–6% 0.3%
Adults7, 9, 10, 34, 40 2.2% 6.0% 5–10% ~0.01%
Sex (Children) Autism ADHD Dyslexia Dyspraxia Dyscalculia Tourette’s
Boys4,8,11 4.9% 15% 7%
Girls4,8,11 1.4% 8% 4%
Condition Male-to-Female Diagnosis Ratio
Tourette’s syndrome35 3–5:1
Autism4 3.4:1
ADHD20 ~4:1 clinical; ~2:1 community
Dyslexia36 ~2:1
Dyspraxia (DCD)11 ~1.9:1
Dyscalculia37 ~1:1

Children are diagnosed at higher rates than adults, and males at higher rates than females, in every condition except dyscalculia, which affects girls as often as boys.37 Adult dyslexia persists for life at the childhood rate; adult Tourette’s drops steeply because tics improve substantially in half to two-thirds of cases by adulthood.7,40 Dyspraxia persists into adulthood in 50–70% of cases but has no adult prevalence estimate, and the 2.2% adult autism figure is a modeled estimate rather than a survey count.10,38 Researchers attribute much of the remaining age and sex gaps to identification, not underlying difference.18,20

The Gender Diagnosis Gap

The diagnosis ratios above shrink with age. Norwegian registry data shows the autism sex ratio falling from 3.67:1 in children to 2.57:1 in adults, and adult ADHD ratios approach 1:1 in screened samples.19,20 The shrinking ratio from childhood to adulthood is the clearest evidence of underdiagnosis in women and girls. A 2024 Lancet Psychiatry review found females with ADHD are diagnosed later, missed more often, and prescribed medication less often at equal symptom severity.20

Diagnosed Prevalence by Race and Ethnicity (U.S. Children)

Group Autism ADHD Learning Disability (Below-Poverty Households, 2007–09) Dyspraxia Tourette’s
Black4,21,41 3.7% 12% 13%
American Indian / Alaska Native21 10%
White4,21,41 2.8% 12% 16%
Hispanic4,21,41 3.3% 10% 9%
Asian / Pacific Islander4,21 3.8% 4%

The learning disability column, which includes dyslexia and dyscalculia, reflects children in families below the poverty line, where diagnosis rates are highest; no national race-segmented data exists for dyspraxia or Tourette’s syndrome.4,21,41 The autism column marks a historic reversal: White children had the highest measured rates for decades, and several minority groups now show higher identification. Learning disability diagnosis varies more by family income than by race.41

Diagnosis Rates by Year (U.S. Children)

Year Autism ADHD Learning Disability (incl. Dyslexia & Dyscalculia) Dyspraxia Tourette’s
2000 0.67%
2003 7.8%
2007 9.5%
2010–2011 1.5% 11.0%
2016 1.9% 9.9% 7.9%
2016–2019 0.3%
2018 2.3%
2020 2.8%
2022 3.2% 11.4% 0.3%
2023 9.2%

Autism identification has nearly quintupled since 2000, learning disability diagnoses rose 16% in just seven years, and Tourette’s has held flat at 0.3%. A 2016 survey redesign means ADHD figures before and after that year are not directly comparable, but the direction is consistent. Parent-reported ADHD rose 42% between 2003 and 2011, then by another one million children between 2016 and 2022.8,32 In the UK, recorded autism diagnoses rose 787% between 1998 and 2018, with the steepest growth among adults and females.18

Adult vs. Childhood Diagnosis

Year Mean Age at Autism Diagnosis, UK
199818 9.6 years
201818 14.5 years

Diagnosis is shifting up the age curve. In the UK’s 20-year cohort study, adults showed the greatest rise in diagnostic incidence of any age band, and the average person being diagnosed kept getting older.18 In the U.S., 15.5 million adults (6.0%) held an ADHD diagnosis by 2023.9 The late-diagnosis wave has also expanded the market for adult supports such as ADHD coaching.

Age at Diagnosis

Condition Typical Age at Diagnosis
Autism22 ~5.0 years (mean)
ADHD, overall23 6.2 years (median)
ADHD, severe presentation23 4 years (median)
ADHD, mild presentation23 7 years (median)

Reliable autism diagnosis is possible by age 2, three years before the average child is actually identified.22 Severity drives timing for ADHD: the more disruptive the presentation, the earlier the diagnosis.

Neurodiversity in the Workplace and Education

Population Neurodivergent Share
Global workforce (estimated)1,24 15–20%
U.S. adults (self-identified, 2025)2 19%
U.S. public school students served under IDEA (2022–23)25 15%

People with neurodivergent conditions make up roughly the same share of the workforce and classroom as they do of the general population: about one in five, while formal identification runs lower. The IDEA share equals 7.5 million U.S. students. Autism is the program’s fastest-growing eligibility category.25,26 Families increasingly pair classroom services with outside supports such as academic coaching.

Employment Rate vs. Neurotypical Peers

Group (UK, Employment Rate) In Employment
People with disabilities overall24 54.7%
People with neurodivergent conditions24 31%
Adults with autism27 21.7%

Adults with autism have the lowest employment rate of any disability group.24,27 U.S. research points the same way. Unemployment among adults with neurodivergent conditions runs 30–40%: roughly three times the rate for people with disabilities overall, and eight times the rate for people without disabilities.24 Researchers attribute these gaps primarily to hiring practices and workplace support rather than capability.24

Disclosure and Accommodations

Indicator Share of Workers
Professionals with neurodivergent conditions uncomfortable disclosing at work (U.S., 2025)28 52%
Worry disclosure would hurt them at work (U.S., 2025)28 64%
U.S. adults who see stigma in requesting accommodations (2025)28 70%
Workers with neurodivergent conditions who have requested an accommodation (2025)28 51%
Requesters whose accommodation improved their experience (2025)28 56%
Employees who have not told their manager or HR (UK, 2024)29 31%

Both stigma and self-advocacy are rising year over year. Perceived accommodation stigma climbed from 60% in 2024 to 70% in 2025, while accommodation requests among workers with neurodivergent conditions also grew.28 The most actionable finding in the workplace data is the mismatch between two numbers. Accommodations usually help when requested (56%), yet 68% of employees with neurodivergent conditions say they do not know what they are entitled to.28

Key Findings

Five findings anchor this report. An estimated 15–20% of the world’s population, 1.2 to 1.6 billion people, has a neurodivergent condition.1,24 U.S. autism identification among 8-year-olds has nearly quintupled since 2000, from 0.67% to 3.2%.4 Adult ADHD diagnoses now cover 15.5 million Americans, yet roughly 60% of symptomatic adults worldwide remain undiagnosed.6,9 Women and adults are the largest undercounted groups in nearly every condition measured; dyscalculia, diagnosed equally across sexes, is the lone exception.19,20,37 And accommodations improve the workplace experience for 56% of those who request them, while 68% of employees with neurodivergent conditions do not know what they are entitled to.28

Rising identification, not rising incidence, drives nearly every trend line in this report. The UK’s 787% growth in recorded autism diagnoses occurred against stable underlying prevalence, with the steepest rises among adults and women: the groups clinicians historically missed.18,20

Citing This Report

All figures come from government surveillance systems, peer-reviewed prevalence studies, and large national surveys. Population bases appear in the tables and accompanying notes, and the full source list is below. Journalists and researchers are welcome to cite this report with attribution and a link to this page.

This report was compiled by New Frontiers Executive Function Coaching, which works with students, families, and professionals across the U.S. For questions about the data, or expert commentary on executive function, ADHD, and neurodivergent conditions, contact the New Frontiers team. Readers exploring support options can learn more on our executive function coaching pages.

Sources

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3. The ND Alliance. What Is Neurodiversity? 2025. https://thendalliance.org/what-is-neurodiversity/

4. CDC, Autism and Developmental Disabilities Monitoring (ADDM) Network. Prevalence and Early Identification of Autism Spectrum Disorder Among Children Aged 4 and 8 Years, 2022. MMWR Surveillance Summaries. April 2025. https://www.cdc.gov/mmwr/volumes/74/ss/ss7402a1.htm

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8. Danielson ML, et al. ADHD Prevalence Among U.S. Children and Adolescents in 2022. Journal of Clinical Child & Adolescent Psychology. 2024. https://pmc.ncbi.nlm.nih.gov/articles/PMC11334226/

9. Staley B, et al. ADHD Diagnosis, Treatment, and Telehealth Use in Adults. NCHS Rapid Surveys System, October–November 2023. CDC MMWR. 2024. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11466376/

10. Dietz PM, et al. National and State Estimates of Adults with Autism Spectrum Disorder. Journal of Autism and Developmental Disorders. 2020. Summary: https://www.neurologyadvisor.com/features/autism-statistics-prevalence/

11. Karunakaran A, et al. The prevalence of developmental coordination disorder in children: a systematic review and meta-analysis. 2024. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11464289/

12. Gross-Tsur V, et al. Developmental dyscalculia: prevalence and demographic features. Developmental Medicine & Child Neurology. https://pubmed.ncbi.nlm.nih.gov/8606013/

13. Prevalence and Comorbidities of Tourette Syndrome in Children and Adolescents: Insights from the National Survey of Children’s Health. 2025. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12437818/

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16. McGrath LM, Stoodley CJ. Are there shared neural correlates between dyslexia and ADHD? Journal of Neurodevelopmental Disorders. 2019. https://link.springer.com/article/10.1186/s11689-019-9287-8

17. van Bergen E, et al. Co-Occurrence and Causality Among ADHD, Dyslexia, and Dyscalculia. Psychological Science. 2025. https://journals.sagepub.com/doi/10.1177/09567976241293999

18. Russell G, et al. Time trends in autism diagnosis over 20 years: a UK population-based cohort study. Journal of Child Psychology and Psychiatry. 2022. https://acamh.onlinelibrary.wiley.com/doi/10.1111/jcpp.13505

19. Posserud M, et al. Male to female ratios in autism spectrum disorders by age, intellectual disability and attention-deficit/hyperactivity disorder. Acta Psychiatrica Scandinavica. 2021. https://onlinelibrary.wiley.com/doi/10.1111/acps.13368

20. Martin J. Why are females less likely to be diagnosed with ADHD in childhood than males? The Lancet Psychiatry. 2024. https://www.thelancet.com/journals/lanpsy/article/PIIS2215-0366(24)00010-5/fulltext

21. CDC. Data and Statistics on ADHD. https://www.cdc.gov/adhd/data/index.html

22. van ‘t Hof M, et al. Age at autism spectrum disorder diagnosis: A systematic review and meta-analysis from 2012 to 2019. Autism. 2021. https://journals.sagepub.com/doi/10.1177/1362361320971107

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28. Understood.org. 2025 Neurodiversity at Work survey. https://www.understood.org/en/press-releases/2025-neurodiversity-at-work-survey

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42. Doyle N. Neurodiversity at work: a biopsychosocial model and the impact on working adults. British Medical Bulletin. 2020;135(1):108–125. https://academic.oup.com/bmb/article/135/1/108/5913187