1 in 50
According to the 2019 Canadian Health Survey on Children and Youth, about 1 in 50 children and youth aged 1 to 17 in Canada had an autism diagnosis
Primary source Public Health Agency of Canada (2024) Verified 2024-03-26
When autism and ADHD may both be part of the picture
A qualified clinician can assess whether both are present.
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When autism and ADHD may both be part of the picture Autism and ADHD can share features, and people can have both. An ADHD diagnosis does not reduce autism services. Autism and ADHD can occur together. A qualified clinician can assess whether both are present. The OAP covers services when autism is the primary diagnosis. Read the guide www.endthewaitontario.com/autism-and-adhd-ontario
Download English captions (WebVTT)A qualified clinician can assess whether both are present. A short explainer with music and captions. 51 seconds.
Next
- Running time 0:50 Getting a diagnosis
Why Are Girls Diagnosed with Autism Later in Ontario?
In Ontario, speaking up early for an assessment can matter. - Running time 0:46 Getting a diagnosis
Out-of-country autism diagnosis: is it valid for OAP?
AccessOAP decides whether a diagnosis from outside Canada is accepted. - Running time 0:50 Getting a diagnosis
Re-Diagnosis of Autism: When Diagnostic Criteria Change
The two-domain criteria (social communication + restricted/repetitive behaviours) replaced the three-domain model.
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Facts 3
Sources 2
91,974
children are registered in the Ontario Autism Program
Primary source MCCSS FOI via OAC · May 2026 Verified 2026-11-03
WHO recommends accessible, community-based early interventions for children with autism. Timely evidence-based psychosocial interventions improve communication and social engagement
Primary source World Health Organization (2025) Verified 2025-09-17
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Last system verification: 2026-11-03. Next scheduled update: 2027-02-01.
About this page
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Written by Spencer Carroll
Founder & Autism Advocate
Lived experience: Parent of autistic child in the OAP system