What Percentage of Adults Have ADHD?

ADHD (attention-deficit/hyperactivity disorder) is often considered a childhood condition that fades with age. However, the latest CDC rapid surveys recorded that 6.0% of U.S. adults (around 1 in 16) currently live with an ADHD diagnosis, a number that has risen from the previously held 4.4% estimate. ^{1 2} Additionally, 55.9% of currently diagnosed adults got their first diagnosis in adulthood rather than childhood. ¹

Adults with ADHD often experience poor self-worth, sensitivity towards criticism, and increased self-criticism, which can stem from higher levels of experienced social judgment throughout their lives.³ To understand the rise in ADHD amongst adults, it is important to map out how the condition has been measured over the years and the other possible factors that are driving this increase.

The following article, put together by researchers at New Frontiers, lays out the key statistics on how and why measured ADHD prevalence has risen in adults. You can find another current analysis of ADHD prevalence figures in How Common Is ADHD? 2026 Statistics.

ADHD Symptoms

Attention-deficit/hyperactivity disorder (ADHD) is defined as a childhood disorder that can continue into adulthood, characterized by the following behavioral symptoms: predominantly inattentive, predominantly hyperactive-impulsive, and combined. However, information on diagnosis and treatment in adults remains limited.^{1 4}

Symptom Chart

Symptom	Description
Inattention	Difficulty with maintaining focus
Hyperactivity	Excessive movement that is deemed inappropriate to the context and setting.
Impulsivity	Hasty actions that occur spontaneously and without thought

Sources: Table 1

ADHD Prevalence Over Time

Unlike the CDC’s child ADHD series, which comes from one consistent set of surveys, no single continuous adult ADHD prevalence survey has been run on a stable yearly basis. The table below compiles separate studies to help paint an overall picture of Adult ADHD prevalence over time.

Most significant are the two estimates that were both drawn from large, nationally representative U.S. surveys using a similar diagnostic framework where the general adult population was surveyed and asked whether they currently have ADHD, rather than whether they were ever diagnosed at any point in their life: the 4.4% figure from the 2001–2003 NCS-R and the 6.0% figure from the 2023 NCHS Rapid Surveys can be compared to see the steady rise in adult ADHD prevalence over time.

Adult ADHD Prevalence Over Time: Year-by-Year Estimates

Data Year(s)	Estimate	Population	Study/Sources
1996–2005	2.5% (pooled)	U.S. adults, 6 studies	Simon et al., 2009; Song et al., 2021, Journal of Global Health.
2001–2003	4.4%	U.S. adults 18–44 (NCS-R)	Kessler et al., 2006, NCS-R.
1996–2011	5.0% (pooled)	U.S. adults, 11 studies (N=14,112)	Willicut, E.G., 2012.
2016–2021	3.6% → 4.1% (treatment proxy, not prevalence)	Commercially insured adults	Danielson et al., 2023.
2020 (modeled)	6.76% symptomatic 2.58%persistent	Global adults (not U.S.-specific)	Song et al., 2021, Journal of Global Health.
2023	6.0%	U.S. adults 18+	Staley et al., 2024, 023 NCHS Rapid Surveys.

Sources: Table 2

How Many Adults Are Newly Diagnosed vs. Diagnosed as Children

Based on the CDC’s 2023 NCHS Rapid Surveys data, an estimated 55.9% of adults with current ADHD were diagnosed at age 18 or older, compared with 44.1% diagnosed before age 18. This reveals that more than half of today’s diagnosed adults grew up without being diagnosed with ADHD in their childhood.

Age of ADHD diagnosis

Age group at Diagnosis	Unweighted	Weighted * % (95% CI)
<18	164	44.1 (37.7–50.6)
≥18	275	55.9 (49.4–62.3)

Sources: Table 3

Why Has Adult ADHD Prevalence Increased?

Diagnostic criteria changes have largely impacted perceived ADHD prevalence. The DSM-5 replaced the DSM-IV in 2013, which specifically revised how ADHD is diagnosed in adults.

Notably, the symptom count required for an adult diagnosis dropped from six to five, a change that acknowledges that ADHD tends to look milder and more compensated in adults than in children.

The pervasiveness requirement was loosened. This element of the ADHD diagnostic criteria confirms that someone’s symptoms show up across different areas of life. DSM-5 shifted from needing impairment in multiple settings to simply needing symptoms present in multiple settings.

Finally, an autism diagnosis no longer automatically excludes an ADHD diagnosis. An estimated 69.6% of adults with ADHD have a documented co-diagnosis of another mental health disorder, and autistic adults whose symptoms overlapped with ADHD could have been diagnosed with only one condition, leaving the other invisible in the data. ² Co-diagnosis allows for the neurodivergent population to be counted within the ADHD diagnostic population.

Therefore, the rise in ADHD diagnoses can be largely attributed to shifts in diagnostic criteria rather than stemming from a sudden rise in who has the condition.

DSM-IV vs. DSM-5 (2013) Criteria Changes and Measured Effect

Criterion	DSM-IV	DSM-5 (2013)	Measured Effect on Prevalence
Onset Age	Symptoms before age 7	Symptoms before age 12	Detection in 12–15-year-olds rose from 7.38% to 10.84%
Adult symptom threshold	6 of 9 symptoms	5 of 9 symptoms	Modeled ~27% increase in young-adult prevalence
Pervasiveness	Impairment in 2+ settings	Several symptoms in 2+ settings	Broadened qualifying cases
Comorbidity rule	Autism exclusionary	Co-diagnosis permitted	Expanded eligible population

Sources: Table 4

How Many Children with ADHD Still Have It As Adults?

Persistence rates measure how many children with ADHD continue to display symptoms once they reach adulthood. However, studies that require subjects to still meet the full diagnostic criteria at age 25 put persistence at around 15%. In comparison, studies that also count partial-remission cases place the figure closer to 65%. Different definitions and thresholds for persistence may explain the discrepancy in ADHD rates from childhood to adulthood.

ADHD Persistence from Childhood into Adulthood

Persistence Definition	Rate	Source / Study
Full diagnostic criteria at age 25	~15%	Faraone, Biederman & Mick (2006)
Including DSM-IV partial remission	~65%	Faraone, Biederman & Mick (2006)
Retained functional impairment	60%–80%	Biederman et al. (2010)
Full criteria in early adulthood	~30%	Biederman et al. (2010)
Ongoing ADHD at mean age 41 (33-yr follow-up)	22%	Klein et al. (2012)
Range across diagnostic methods	4.0%–77.0%	Sibley et al., Lancet Psychiatry (2016)

Sources: Table 5

A Closer Look at ADHD Demographics

In 2024, data from the National Center for Health Statistics Rapid Surveys System collected in 2023 were used to estimate ADHD prevalence in adults 18 and older. These numbers describe the composition of the adult ADHD population, or what share of all diagnosed adults falls into each group.

Age Composition of ADHD Prevalence

Age	Prevalence
Adults ages 18-24	21.7%
Adults ages 25-29	62.8%
Adults ages 50-64	10.6%
Adults ages 65 and over	4.9%

Sources: Table 6

Nearly 85% of adults with ADHD are ages 18-29, confirming that the overwhelming majority of adults with diagnosed ADHD are under 50.

Gender Composition of ADHD Prevalence

Gender	Prevalence
Female	44.2%
Male	55.8%

Sources: Table 7

Though the diagnosed adult ADHD population is fairly evenly split by gender, that narrower gap between 55.8% adult males and 44.2% adult females stands in contrast to childhood ADHD diagnoses, where boys are ever-diagnosed with ADHD at 15.6% versus 8.2% for girls. ⁵

Race and Ethnicity Composition of ADHD Prevalence

Race and Ethnicity	Prevalence
Black/African American	7.4%
White	70.4%
Hispanic or Latino	16.6%
Other	5.6%

Sources: Table 8

Among adults with a current ADHD diagnosis, White adults are represented at nearly ten times the rate of Black or African American adults (70.4% vs. 7.4%), and roughly four times the rate of Hispanic or Latino adults (70.4% vs. 16.6%). This gap likely reflects disparities in diagnosis rates and healthcare.

Education Composition of ADHD Prevalence

Education	Prevalence
High school diploma or less	41.8%
Some college education	30.1%
Bachelor’s degree or above	28.1%

Sources: Table 9

Adults with current ADHD are less likely to have a bachelor’s degree or higher compared with adults who have never been diagnosed, raising questions about how undiagnosed or unmanaged ADHD symptoms may affect educational attainment over time.

Household Income Composition of ADHD Prevalence

Household Income	Prevalence
Less than 100% of the federal poverty level	22.1%
100% to less than 200% of the federal poverty level	14.5%
200% to less than 400% of the federal poverty level	23.3%
Incomes of 400% of the federal poverty level or more	40.0%

Sources: Table 10

22.1% of adults with current ADHD live below the federal poverty level, 14.5% fall between 100–200% of the poverty level, 23.3% between 200–400%, and 40.0% at or above 400% of the poverty level. Adults with ADHD report an average of 21.6 more days of lost work productivity per year than their neurotypical peers due to executive dysfunction and burnout. ²

Conclusion

The rise in reported adult ADHD reflects diagnostic criteria that are evolving to account for alternate, previously overlooked ADHD presentations. Adult ADHD remains a relatively misunderstood and under-studied field, but the shift towards more inclusive diagnostic standards is helping make a more accurate diagnosis more attainable for adults in search of answers.

For related neurodevelopmental data, see Average Age of ADHD Diagnosis and Most Common Neurodivergent Conditions. To learn how structured coaching supports academic and life outcomes for adults with ADHD, explore New Frontiers ADHD coaching for Adults.

References

1. Staley, B. S., Robinson, L. R., Claussen, A. H., Katz, S. M., Danielson, M. L., Summers, A. D., Farr, S. L., Blumberg, S. J., & Tinker, S. C. (2024). Attention-Deficit/Hyperactivity Disorder Diagnosis, Treatment, and Telehealth Use in Adults — National Center for Health Statistics Rapid Surveys System, United States, October–November 2023. MMWR, 73(40), 890–895. https://www.cdc.gov/mmwr/volumes/73/wr/mm7340a1.htm
2. Huntington Psychological Services. Adult ADHD Statistics. https://huntingtonpsych.com/blog/adult-adhd-statistics
3. What is ADHD?. Psychiatry.org – What is ADHD? (n.d.). https://www.psychiatry.org/patients-families/adhd/what-is-adhd
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Rohde, L. A. (2008). Is there a need to reformulate attention deficit hyperactivity disorder criteria in future nosologic classifications? Child and Adolescent Psychiatric Clinics of North America, 17(2), 405–420.

1. Centers for Disease Control and Prevention, National Center for Health Statistics. (2024). FastStats: Attention Deficit Hyperactivity Disorder (ADHD). https://www.cdc.gov/nchs/fastats/adhd.htm

Table 1:

1. What is ADHD?. Psychiatry.org – What is ADHD? (n.d.). https://www.psychiatry.org/patients-families/adhd/what-is-adhd

Table 2:

1. Song, P., et al. (2021). The prevalence of adult ADHD: A global systematic review and meta-analysis. Journal of Global Health, 11, 04009. https://jogh.org/the-prevalence-of-adult-attention-deficit-hyperactivity-disorder-a-global-systematic-review-and-meta-analysis/

Simon V, Czobor P, Bálint S, Mészáros A, Bitter I.Prevalence and correlates of adult attention-deficit hyperactivity disorder: meta-analysis. Br J Psychiatry. 2009;194:204-11. 10.1192/bjp.bp.107.048827 [DOI] [PubMed] [Google Scholar]

1. Kessler, R. C., et al. (2006). National Comorbidity Survey Replication (NCS-R). Cited in National Institute of Mental Health. Attention-Deficit/Hyperactivity Disorder (ADHD). https://www.nimh.nih.gov/health/statistics/attention-deficit-hyperactivity-disorder-adhd
2. Willcutt, E. G. (2012). The prevalence of DSM-IV attention-deficit/hyperactivity disorder: A meta-analytic review. Neurotherapeutics, 9(3), 490–499.
3. Danielson, M. L., Bohm, M. K., Newsome, K., et al. (2023). Trends in Stimulant Prescription Fills Among Commercially Insured Children and Adults — United States, 2016–2021. MMWR, 72(13), 327–332. https://www.cdc.gov/mmwr/volumes/72/wr/mm7213a1.htm
4. Song, P., et al. (2021). The prevalence of adult ADHD: A global systematic review and meta-analysis. Journal of Global Health, 11, 04009. https://jogh.org/the-prevalence-of-adult-attention-deficit-hyperactivity-disorder-a-global-systematic-review-and-meta-analysis/
5. Staley, B. S., et al. (2024).

Table 3:

1. CDC’s 2023 NCHS Rapid Surveys System data, as reported in Staley, B. S., et al. (2024).

Table 4:

1. American Psychiatric Association. (2013). DSM-5 Attention-Deficit/Hyperactivity Disorder Fact Sheet. https://www.psychiatry.org/File%20Library/Psychiatrists/Practice/DSM/APA_DSM-5-ADHD.pdf
2. Vande Voort, J. L., He, J.-P., Jameson, N. D., & Merikangas, K. R. (2014). Impact of the DSM-5 Attention-Deficit/Hyperactivity Disorder Age-of-Onset Criterion in the US Adolescent Population. Journal of the American Academy of Child & Adolescent Psychiatry, 53(7), 736–744. https://www.sciencedirect.com/science/article/abs/pii/S089085671400255X
3. Matte, B., et al. (2015). ADHD in DSM-5: a field trial in a large, representative sample of 18- to 19-year-old adults. Psychological Medicine, 45(2), 361–373. https://pmc.ncbi.nlm.nih.gov/articles/PMC4301194/
4. Adult ADHD Diagnosis, Management, and Treatment in the DSM-5 Era. (2024). The Primary Care Companion for CNS Disorders. https://www.psychiatrist.com/pcc/adult-adhd-in-the-dsm-era/

Table 5:

1. Faraone, S. V., Biederman, J., & Mick, E. (2006). The age-dependent decline of ADHD: A meta-analysis of follow-up studies. Psychological Medicine, 36(2), 159–165. https://scholars.mssm.edu/en/publications/the-age-dependent-decline-of-attention-deficit-hyperactivity-diso-2/
2. Biederman, J., Petty, C. R., Evans, M., Small, J., & Faraone, S. V. (2010)

Caye, A., et al. (2016). Predictors of persistence of ADHD into adulthood. European Child & Adolescent Psychiatry. https://link.springer.com/article/10.1007/s00787-016-0831-8

1. Klein, R. G., et al. (2012). 33-year follow-up of childhood ADHD, cited in Cambridge Core review. https://www.cambridge.org/core/journals/acta-neuropsychiatrica/article/14AA5ED9006BFE88205580076792CC51
2. Sibley, M. H., et al. (2016). Method of adult diagnosis influences estimated persistence of childhood ADHD. The Lancet Psychiatry. https://www.thelancet.com/journals/lanpsy/article/PIIS2215-0366(16)30190-0/abstract

Table 6, Table 7, Table 8, Table 9, Table 10:

1. Staley, B. S., et al. (2024).