Autism Rates in Canada: Statistics for 2026

Autism spectrum disorder (ASD) affects approximately 1 in 100 people globally, according to the World Health Organization. In Canada, the figure used on this page comes from the Public Health Agency of Canada's summary of the 2019 Canadian Health Survey on Children and Youth: about 1 in 50 children and youth aged 1 to 17 had an autism diagnosis.

The Public Health Agency of Canada (PHAC) and Statistics Canada have tracked autism prevalence through national surveys. Data consistently show that autism is one of the most common neurodevelopmental conditions in Canada, affecting hundreds of thousands of individuals across all age groups and provinces.

World Health Organization Autism Fact Sheet; Public Health Agency of Canada summary of the 2019 Canadian Health Survey on Children and Youth. · Updated 2026-08-10

Globally, autism prevalence varies significantly by country, often due to differences in diagnostic capacity rather than true differences in occurrence. Countries with strong diagnostic systems report higher rates, while low- and middle-income countries report lower rates due to limited access to assessment.

Learn more about autism on our What is Autism page, or explore the key facts about autism in Ontario.

Historically, autism has been diagnosed far more frequently in males than females. Current data suggest autism is 3 to 4 times more commonly diagnosed in boys, though this ratio is narrowing as understanding of autism in women and girls improves.

World Health Organization Autism Fact Sheet · Updated 2026-08-10

Research increasingly shows that autism presents differently across genders. Women and girls are more likely to engage in "masking", consciously or unconsciously mimicking neurotypical social behaviour, which delays diagnosis. This means many women receive their first autism diagnosis in adulthood, sometimes after decades of misdiagnosis.

Autism occurs across all racial, ethnic, and socioeconomic groups. However, access to diagnosis and services is not equal, families with higher incomes and access to private assessment receive diagnoses earlier and access services sooner.

Canada does not have a national autism funding program, and support structures vary significantly by province. Ontario's OAP is a large provincial autism program, but program size does not by itself establish adequacy or capacity.

Autism prevalence in Canada is estimated at 1 in 50 children and youth aged 1 to 17, according to the Public Health Agency of Canada's summary of the 2019 Canadian Health Survey on Children and Youth. That survey estimate and the OAP's 91,974 registrations describe different populations and timeframes; they cannot be subtracted or used to quantify Ontario under-registration. Children who have not received a diagnosis may not yet be eligible to register, but this page does not estimate the size of that group.

OAP registration: MCCSS Ontario Autism Program figures, May 13, 2026, obtained by the Ontario Autism Coalition under Freedom of Information; autism prevalence: Public Health Agency of Canada summary of the 2019 Canadian Health Survey on Children and Youth. · Updated May 13, 2026

Other provinces use different funding and service models. British Columbia's Autism Funding Program, Alberta's PDD program, and Quebec's CISSS/CIUSSS networks are not directly comparable with Ontario's OAP registration snapshot. This page does not rank provinces or infer a national waitlist leader from non-comparable sources.

The 2026-27 Ontario Budget lists $965M for autism services. The FAO's $1.35B figure is a historical 2020 estimate at 2018-19 service levels, not a current shortfall or a like-for-like requirement. The OAP registration count and the historical budget estimate should not be combined to project today's funding need without a new costing study.

2026–27 Ontario Budget; Financial Accountability Office of Ontario. · Updated 2026–27 Ontario Budget; 2020 FAO estimate