CDC Reports U.S. Autism Identification at 1 in 31 Children Aged 8, With Notable Demographic Shifts

The identification of autism among U.S. 8-year-olds has reached 1 in 31 children, according to new CDC data published in the April 17, 2025 Surveillance Summary (SS7402). This marks a continued upward trend from the 1 in 36 rate reported in 2020, with the overall 3.2% crude prevalence representing the highest recorded rate in the history of the CDC's Autism and Developmental Disabilities Monitoring (ADDM) Network.

Key Findings

The ADDM Network report, which tracks autism identification across 16 U.S. sites, found significant geographic variations in identification rates. For example, San Diego County reported autism in 1 in 19 children, while a Texas site found 1 in 103 — a nearly fivefold difference that may reflect disparities in access to diagnostic services, differences in identification practices, or true prevalence variations, as noted by the CDC report.

The data comes from reviewing health and education records of about 8% of U.S.

Demographic patterns also shifted notably. As Johns Hopkins researchers noted, identification rates increased among Black, Hispanic, and female children — groups historically underdiagnosed. The adjusted prevalence ratios for female identification showed particular progress, though gaps remain.

What's Driving the Increase?

Experts emphasize this rise primarily reflects improved screening and broader diagnostic criteria, not a biological change in autism occurrence. As MedPage Today reported, the ADDM Network's methodology has been broadly comparable since 2000, though it has evolved with DSM-5 criteria adoption in 2014 and other changes.

'These numbers tell us more about our diagnostic systems and access to services than about any biological change,' said one researcher quoted by CNN. The data comes from reviewing health and education records of about 8% of U.S. 8-year-olds, not population-wide screening.

Limitations

The ADDM Network data, while rigorous, isn't nationally representative. Prevalence estimates also don't account for children without access to diagnostic services or later identifications; many autistic people aren't identified until adolescence or adulthood. The 2022 surveillance year coincided with COVID-19 pandemic disruptions, which may have affected identification patterns.