Child psychology statistics show both widespread strengths and substantial mental health needs. In the United States, most young children are reported to smile, laugh, show curiosity, and remain affectionate, while diagnosed anxiety, depression, behavior disorders, stressful experiences, and emergency department use affect many others. Global estimates also show that mental health conditions commonly begin during childhood or adolescence.
Contents
- Flourishing and everyday development
- Diagnosed mental health conditions
- Adolescent symptoms and school experiences
- Global child and adolescent mental health
- Autism and ADHD statistics
- Stressful life events and childhood context
- Emergency care and access to treatment
Flourishing and everyday development
The CDC’s Data and Statistics on Children’s Mental Health reports several indicators of positive development among children in the United States. Among children ages 6 months to 5 years, 78% exhibit all four indicators of flourishing. Within the same age range, 96% are usually or always affectionate and tender with parents or caregivers, 82% usually or always bounce back quickly when things do not go their way, 95% usually or always show interest and curiosity in learning new things, and 99% usually or always smile and laugh.
The pattern changes as the indicators are defined for older children. Among children ages 6 to 17, 60% exhibit all three indicators of flourishing. In this group, 83% usually or always show interest and curiosity in learning new things, 72% usually or always stay calm and in control when faced with a challenge, and 80% usually or always work to finish tasks they start. These are survey measures of reported behavior and development, not diagnoses or clinical assessments.
The comparison below places the age groups side by side while retaining the different indicator definitions used for each group.
| Measure | Ages 6 months–5 years | Ages 6–17 years |
|---|---|---|
| All flourishing indicators | 78% across four indicators | 60% across three indicators |
| Interest and curiosity in learning | 95% | 83% |
| Other reported strength | 99% smile and laugh | 80% work to finish tasks |
| Regulation-related measure | 82% bounce back quickly | 72% stay calm during a challenge |
These figures describe population-level patterns rather than the experience of every child. They also illustrate why child psychology statistics need age ranges and exact wording: bouncing back, staying calm, completing tasks, and showing curiosity are related aspects of development, but they are not interchangeable measures.
Diagnosed mental health conditions
The CDC reports that 21% of children ages 3 to 17 had ever been diagnosed with a mental, emotional, or behavioral health condition in 2021. Current-condition estimates for 2022–2023 identify differences among anxiety, behavior disorders, and depression. During that period, 11% of children ages 3 to 17 had current diagnosed anxiety. The figure was 9% among males and 12% among females.
Current diagnosed behavior disorders affected 8% of children ages 3 to 17 in 2022–2023. The estimate was 10% among males and 5% among females. Current diagnosed depression affected 4% overall, including 3% of males and 6% of females.
| Current diagnosed condition, ages 3–17 | Overall | Males | Females |
|---|---|---|---|
| Anxiety, 2022–2023 | 11% | 9% | 12% |
| Behavior disorders, 2022–2023 | 8% | 10% | 5% |
| Depression, 2022–2023 | 4% | 3% | 6% |
The overall lifetime diagnosis statistic from 2021 should not be read as a direct substitute for the current-condition estimates from 2022–2023. “Ever diagnosed” covers a different time frame from “current diagnosed,” and the survey periods differ. Together, however, the figures show why child psychology statistics should identify both the reference period and the definition of the outcome.
Adolescent symptoms and school experiences
Among U.S. adolescents ages 12 to 17, 20% reported symptoms of anxiety during the past two weeks in 2021–2023, while 18% reported symptoms of depression during the past two weeks. These are symptom reports over a defined recent period, not the same measure as a clinician-recorded diagnosis.
The CDC Youth Risk Behavior Survey provides additional 2023 estimates for U.S. high school students. Forty percent felt so sad or hopeless almost every day for at least two weeks in a row that they stopped doing usual activities. Twenty-nine percent experienced poor mental health during the past 30 days. Sixteen percent made a suicide plan during the past year, 9% attempted suicide one or more times during the past year, and 2% made a suicide attempt that resulted in an injury, poisoning, or overdose treated by a doctor or nurse.
These measures cover different windows: the past 30 days, the past year, or a two-week period. They should therefore be read as separate indicators rather than added together. The results also concern high school students, whereas the adolescent symptom estimates cover ages 12 to 17; the populations are related but not identical.
Global child and adolescent mental health
The World Health Organization estimates that 8% of children worldwide experience a mental disorder and that 15% of adolescents worldwide experience one. In a separate estimate, one in seven 10–19-year-olds globally, or 14.3%, experience mental health conditions. WHO also reports that mental health conditions account for 15% of the global burden of disease among people ages 10–19.
The estimates use different age groups and concepts, so the 8%, 15%, and 14.3% figures are not a single time series. “Mental disorder,” “mental health conditions,” and “burden of disease” answer different questions. WHO reports that half of mental health conditions start by age 18, emphasizing the importance of early development and early support.
For specific conditions, WHO estimates that ADHD occurs among 2.7% of 10–14-year-olds globally and 2.2% of 15–19-year-olds. Conduct disorder occurs among 3.3% of 10–14-year-olds and 1.8% of 15–19-year-olds. Eating disorders occur in an estimated 0.1% of 10–14-year-olds and 0.4% of 15–19-year-olds.
Suicide is the third leading cause of death among people ages 15–29, according to WHO. This is a mortality ranking, not a prevalence estimate, and it should not be combined with the percentages describing symptoms or diagnoses.
Autism and ADHD statistics
The National Institute of Mental Health reports an estimated autism spectrum disorder prevalence of about 1 in 31, or 3.2%, among 8-year-old children in 2022. In the 2022 ADDM estimates, ASD was 3.4 times as prevalent among boys as among girls. Prevalence was 4.9% among boys and 1.4% among girls.
The same estimates reported ASD prevalence of 3.8% among Asian/Pacific Islander 8-year-olds, 3.7% among Black 8-year-olds, and 3.3% among Hispanic 8-year-olds. These estimates describe identified prevalence in the specified surveillance population and year; they do not establish that race or ethnicity itself causes the observed differences.
For U.S. adolescents ages 13 to 18, NIMH reports a lifetime ADHD prevalence of 8.7%. Nearly half of ADHD cases showed severe impairment, represented by an estimate of 4.2%. ADHD affected 13.0% of male adolescents and 4.2% of female adolescents in the cited estimates.
NIMH also reports a lifetime prevalence of major depressive disorder or dysthymia of 11.2% among 13–18-year-olds, with 3.3% having severe major depressive disorder or dysthymia. A separate 2015 estimate put the 12-month prevalence of a major depressive episode among U.S. adolescents at 12.5% overall, including 19.5% of female adolescents and 5.8% of male adolescents. Because lifetime and 12-month prevalence use different periods, these estimates should not be treated as direct comparisons.
The historical ADHD figures also require their original dates. The prevalence of children ever diagnosed with ADHD rose by 42%, from 7.8% in 2003 to 11.0% in 2011. Among children with current ADHD, the median age of onset was 6 years. The median age of diagnosis was 4 years for severe ADHD, 6 years for moderate ADHD, and 7 years for mild ADHD. About one-third of children diagnosed with ADHD retain the diagnosis into adulthood, and an estimated 69.3% of children with a current diagnosis received ADHD medication in 2011. These legacy figures are presented with their reported periods and were not independently rechecked here.
Stressful life events and childhood context
CDC National Health Statistics Reports provide 2021 estimates for stressful life events among U.S. children ages 2 to 17. Overall, 19.9% experienced any stressful life event. The estimate was 9.8% among children ages 2 to 5 and 27.4% among children ages 12 to 17.
The same report found that 33.4% of children of other and multiple races experienced any stressful life event, as did 26.9% of children with Medicaid or other public health coverage and 35.5% of children living in families with one adult. These are subgroup estimates and should not be interpreted as explanations for individual outcomes.
Regarding the number and type of experiences, 11.4% of children experienced exactly one stressful life event, 4.9% experienced exactly two, and 3.6% experienced three or more. Eight percent had ever lived with a household member with mental illness, 7.7% had ever lived with a household member with substance abuse, and 5.7% had a parent who had ever been incarcerated.
The report also estimated that 5.2% of children were victims or witnesses of neighborhood violence, 4.7% experienced racism, 3.5% experienced emotional abuse, and 2.5% experienced unmet basic needs in 2021. These categories describe reported experiences and are not diagnoses. Their presence can help explain why psychological development is studied within family, school, neighborhood, and economic contexts rather than in isolation.
Emergency care and access to treatment
During 2018–2021, U.S. children and adolescents with a mental health disorder accounted for an annual average of 1,026,000 emergency department visits, or 3.5% of all emergency department visits by children and adolescents. The ED visit rate for this group was 14.0 per 1,000.
By diagnostic category, the rates were 5.0 per 1,000 for mood disorder visits, 4.4 for anxiety disorder visits, 3.7 for behavioral and emotional disorder visits, 1.8 for substance use disorder visits, and 1.7 for developmental disorder visits. The rates are visit rates, not the percentages of children who have each condition.
Age and demographic differences were also reported. The mental-health-related ED visit rate was 30.7 for adolescents ages 12 to 17 and 5.3 for children younger than 12. The rate was 16.1 for girls and 12.1 for boys, 20.8 for Black non-Hispanic children and adolescents, and 13.2 for Hispanic children and adolescents.
Medicaid was the primary expected source of payment for 60.2% of mental-health-related ED visits by children and adolescents during 2018–2021, while private insurance was the primary expected source for 35.3%. Separately, the CDC reports that about 20% of children with mental, emotional, or behavioral disorders receive care from a specialized mental health care provider. Together, these figures describe both acute-care use and a limited share receiving specialized care; they do not measure every form of support delivered by families, schools, primary-care clinicians, or community services.