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Why are the autism rates in the US rising?
Autism rates in the United States have reached their highest levels yet. According to the latest data from the Centers for Disease Control and Prevention (CDC), 1 in 31 children is now diagnosed with autism spectrum disorder (ASD). These results mark a significant increase compared to previous reports and have ignited crucial conversations among parents, educators, and healthcare professionals.
This blog by ABA Centers of Washington examines the 2025 CDC data on autism rates in the US, explores the factors behind this increase, and discusses its implications for families, schools, and society at large. We’ll answer pressing questions like “Why are the autism rates in the US rising?” while offering insights into what we can do to provide better support to families with neurodiverse children.
Key Findings from the CDC Report
The CDC’s Autism and Developmental Disabilities Monitoring (ADDM) Network analyzed data from 16 monitoring sites across the US. Here’s what the 2025 statistics reveal about autism rates and demographics.
- Prevalence is now 1 in 31 children
The newest data shows that approximately 1 in 31 children, or 3.2% of 8-year-olds in the US, has been diagnosed with ASD. This increase represents a significant leap from the 2020 statistic of 1 in 36 children, indicating a trend of consistently rising diagnoses over the years.
- Boys are 3.4 times more likely to be diagnosed
Boys continue to make up most ASD diagnoses, with a rate 3.4 times higher than that of girls. This data reflects biological differences and potential disparities in how autism presents between genders.
- Autism prevalence is highest in minority populations
Autism rates have risen significantly among Asian, Black, and Hispanic children. These communities were previously underdiagnosed or underrepresented in past data and now show a higher prevalence of ASD compared to White children. For instance, 38.2 per 1,000 Asian and Pacific Islander children and 36.6 per 1,000 Black children were diagnosed, compared to 27.7 per 1,000 White children.
- Cognitive ability varies across diagnoses
The report cites that around one-third of children with ASD have intellectual disabilities (IQ ≤70), while others display average or above-average cognitive abilities (IQ >70). This result in cognitive ability underscores the broad spectrum of needs and capabilities within the autism community.
Factors Contributing to Rising Autism Rates
Several factors have likely contributed to the consistent increase in autism diagnoses. The following are what most experts agree on:
Better Awareness and Screening
Heightened awareness among parents, educators, and healthcare providers has led to earlier detection of autism. Pediatricians now routinely screen children for early developmental delays at 18 and 24 months, making it easier to identify ASD well before children enter school.
Broadened Diagnostic Criteria
Changes in the way experts define autism have also contributed to rising rates. The Diagnostic and Statistical Manual of Mental Disorders (DSM) expanded its criteria for diagnosing autism over time, capturing a wider range of behavioral presentations.
Earlier Diagnoses
The median age of diagnosis has steadily fallen, with many children now receiving an autism diagnosis before their fourth birthday. Early diagnosis is critical, as it allows access to intervention programs that can improve developmental outcomes.
Regional Variations in Autism Identification
One of the most striking findings from the CDC report is how much autism diagnosis rates vary by region. States like California, at the forefront of early screening initiatives, report significantly higher rates, with 53.1 per 1,000 children diagnosed. Meanwhile, areas with fewer healthcare resources, such as parts of Texas, report much lower rates (9.7 per 1,000).
These gaps suggest that many children in underserved regions may not receive evaluations or access to services, leaving them undiagnosed and unsupported. Bridging these disparities remains a critical public health challenge.
Autism Rates in the US: What Are the Causes and Risk Factors
Although we can attribute the rising autism rates in the US to better diagnosis and expanded criteria, researchers continue to investigate potential causes and risk factors.
Genetic Factors
Autism is one of the most highly heritable developmental conditions, with genes playing a role in up to 90% of cases. Advances in genetics have pinpointed hundreds of gene mutations associated with autism, though we need more research to understand how these mutations interact.
Environmental Influences
Researchers are also examining environmental factors and their role in autism risk. These include:
- Parental age: Older parental age is associated with a slightly higher risk of autism.
- Premature Birth: Premature babies or those with low birth weight have an increased likelihood of developmental disorders, including autism.
- Exposure to Pollution: Fine particulate matter and other forms of air pollution are suspected to contribute to neurodevelopmental delays.
- Prenatal Health Complications: Maternal infections or diabetes during pregnancy may increase risks.
While experts have not identified a singular cause for autism, scientists emphasize that it is likely the result of a complex interplay between genetic predispositions and environmental factors.
Why Autism Rates Matter & Steps Moving Forward
The rise in autism rates in the US has profound implications for how society supports individuals with ASD. From early intervention programs to school accommodations, it is critical to ensure that the growing number of children and families affected by autism receive the resources they need to thrive.
- Prioritize Early Screening and Intervention
Early intervention has significantly improved outcomes for children with ASD. Programs like Applied Behavior Analysis (ABA) therapy can help children learn social and communication skills. Parents and pediatricians should work together to ensure regular developmental screenings.
- Promote Inclusion in Education
With more children requiring Individualized Education Programs (IEPs), schools must equip themselves with trained staff, sensory-friendly spaces, and resources that effectively support students with ASD.
- Invest in Research and Community Support
Continued research is needed to explore the underlying causes of autism and improve interventions. Families also benefit from local support groups and national organizations, like Autism Speaks, which offer toolkits for navigating public services, education systems, and healthcare.
Building a Supportive Future
The upward trend in autism rates in the US reflects significant advancements in awareness, diagnosis, and inclusive practices. But with these strides come new challenges, such as ensuring equitable access to services and understanding the root causes of autism.
Whether you’re a parent seeking guidance, an educator supporting students, or a healthcare provider on the frontlines, understanding why autism rates are increasing is a shared responsibility. Together, we can work toward a world where every individual on the spectrum can reach their fullest potential.
More About Autism Support Services in ABA Centers of Washington
At ABA Centers of Washington, we are committed to providing real, accessible support to individuals with ASD and families seeking a diagnosis. We know this journey can be filled with questions and obstacles, which is why we strive to make a difference with wait times significantly shorter than the national average—just three weeks.
We have a team of dedicated professionals who offer one-on-one ABA therapy, parent training and support, community workshops, and early intervention. We always take a person-centered approach and focus on the individual and their needs.
Our initiatives empower children and teenagers with autism and their families, helping them to participate actively and successfully in their environment.
In addition to staying informed about autism rates and relevant developments around ASD in the United States, what really drives us is providing the practical and emotional support families need to navigate neurodiversity with confidence.
If you’re looking for a diagnostic evaluation or access to ABA therapy, we’re here to help. Call (877) 554-0710 or speak with an expert at no cost online.
