Autism statistics & prevalence

1 in 36

Children in the US are diagnosed with autism

The CDC's most recent estimate (2020 data, published 2023) found autism in 1 in 36 8-year-olds — up from 1 in 44 in the prior report. The increase reflects broader diagnostic criteria and improved identification, not a true epidemic.

4×

More common in boys than girls

Boys are diagnosed with autism approximately 4 times more often than girls. Research suggests girls are frequently underdiagnosed due to different presentation patterns and stronger masking behaviors.

5,437,988

Adults in the US live with autism

An estimated 5.4 million adults in the US are autistic — far more than just children. Autism is a lifelong condition, and the needs of autistic adults represent a significant and growing area of policy and service focus.

Age 4

Average age of autism diagnosis in the US

Despite the fact that autism can often be identified as early as 18–24 months, the average age of diagnosis remains around 4–5 years. Early identification and intervention are critical but frequently delayed.

40%

Of autistic children are minimally verbal or non-verbal

Approximately 40% of autistic individuals are minimally verbal or non-verbal. With early intervention, many children who are non-verbal in early childhood develop functional communication.

17 months

Average delay between first concerns and diagnosis

Parents typically first notice developmental differences around 18 months, but the average child doesn't receive a diagnosis until they are around 4–5 years old — a delay of nearly 3 years that delays access to early intervention.