Roughly 1 in 7 children and adolescents worldwide, about 14.3% of those aged 10 to 19, live with a mental health condition. In the United States, the numbers are higher and climbing: among publicly insured children, the share with any mental health or neurodevelopmental diagnosis rose from 10.7% in 2010 to 16.5% in 2019. The picture varies dramatically depending on a child’s age, background, and which condition you’re looking at.
The Most Common Conditions by Age
Anxiety is the single most prevalent mental health condition in American children, and it becomes far more common as kids get older. CDC data from 2022 to 2023 breaks it down clearly across three age groups:
- Ages 3 to 5: 2.3% have anxiety, 0.1% have depression, and 5.0% have a behavior disorder.
- Ages 6 to 11: 9.2% have anxiety, 1.9% have depression, and 9.6% have a behavior disorder.
- Ages 12 to 17: 16.0% have anxiety, 8.7% have depression, and 6.8% have a behavior disorder.
The pattern is striking. Anxiety and depression both surge during adolescence, with anxiety affecting roughly 1 in 6 teenagers. Depression jumps from nearly nonexistent in preschoolers to close to 1 in 11 teens. Behavior disorders follow the opposite curve, peaking in elementary school and declining somewhat in the teen years.
Rates Are Rising, Not Holding Steady
These numbers aren’t stable. A large study published in JAMA tracked millions of publicly insured children from 2010 to 2019 and found that overall mental health diagnoses increased by nearly 7 percentage points over that decade, even after adjusting for demographic changes. The share of children carrying two or more diagnoses simultaneously nearly doubled, going from 3.0% to 5.5%.
The biggest absolute increases were in ADHD (up 2.3 percentage points), trauma and stress-related disorders (up 1.7 points), anxiety (up 1.6 points), and autism spectrum disorders (up 1.1 points). Depression rose by about 1 percentage point. These increases likely reflect a combination of genuinely worsening mental health and better recognition and screening, though researchers continue to debate the relative weight of each factor.
Behavior Disorders in Detail
Behavior disorders, which include oppositional defiant disorder (ODD) and conduct disorder, are among the earliest conditions to appear and are particularly common in young boys. A meta-analysis estimated the combined childhood prevalence of ODD and conduct disorder at about 6.1%. Conduct disorder alone affects roughly 3.5% of children, while ODD affects around 2.8%.
Parent-reported data puts the number slightly lower: about 4.6% of children aged 3 to 17 have ever been diagnosed with ODD or conduct disorder, with 3.5% having a current condition. These disorders often overlap with ADHD and can be mistaken for simple defiance, which means some children go years before receiving appropriate support.
Racial and Ethnic Disparities
Mental health conditions don’t affect all children equally, and the gaps in both prevalence and treatment are significant. Black children have higher rates of ADHD (10.5%) and behavior problems (10.1%) compared to White children (9.9% and 7.0%, respectively). White children, meanwhile, report higher rates of anxiety (9.7%) than Hispanic (6.1%) or Black (5.3%) children.
One of the most alarming disparities involves suicide among young children. Black children between ages 5 and 11 die by suicide at twice the rate of White children in the same age group. Among older teens (14 to 18), Black adolescents report the highest rate of suicide attempts at 11.8%, compared to 8.9% for Hispanic teens and 7.9% for White teens.
Despite higher prevalence of several conditions, Black and Hispanic children are consistently less likely to receive mental health services. Only 8.7% of Hispanic children and 9.8% of Black children received professional mental health treatment in recent surveys, compared to 11.4% of White children. Black children also face an average three-year delay in autism diagnosis after parents first raise concerns with a doctor. When Black and Hispanic children do reach emergency rooms for mental health crises, they arrive at higher rates through school referrals for aggression, and Black children are more likely to be physically or chemically restrained during treatment.
Social Media and the Teenage Mental Health Surge
The steep rise in anxiety and depression among teenagers has coincided with the explosion of social media use, and the data connecting the two is becoming harder to dismiss. Children and adolescents who spend more than three hours a day on social media face double the risk of depression and anxiety symptoms compared to those who spend less time. The U.S. Surgeon General flagged this as a major concern, noting that the average teenager now spends 3.5 hours per day on social media platforms, putting a typical teen right at the threshold where risk doubles.
This doesn’t mean social media is the sole driver of rising rates. But it does mean that the average teenager’s daily habits now place them squarely in a higher-risk category, on top of whatever academic pressure, family stress, or biological vulnerability they may already carry.
The Treatment Gap
Perhaps the most consistent finding across all the data is how many children with mental health conditions receive no care at all. The WHO estimates that globally, the vast majority of adolescents with mental health conditions go unrecognized and untreated. In the U.S., where access is better than most countries, only about 10% of children receive any professional mental health treatment. That figure sits well below the 14 to 17% who meet criteria for at least one condition, meaning millions of American children with a diagnosable disorder are managing without professional help.
The gap is widest for younger children, minority populations, and families in rural areas. For a preschooler with emerging anxiety or a six-year-old with behavior problems, the path to a diagnosis often runs through a pediatrician who may have limited mental health training and a months-long waitlist for a specialist. Many families never make it past that first bottleneck.