Canadian Childhood, Youth Autism Prevalence Reaches 2.25% In 2024

About 2.25% of Canadian children and youth had been diagnosed with autism as of the end of fiscal year 2024, according to Canadian surveillance data. In the United States, about 3.22% of 8-year-old children had autism in 2022, according to estimates from 16 participating sites released in 2025 by the Centers for Disease Control and Prevention.

The Canadian estimate is the first compiled by the Public Health Agency of Canada’s Canadian Chronic Disease Surveillance System. The data show the prevalence of autism has increased from 0.14% in 2001 to 2.25% in 2024. The . . .