Aging with Autism: Support for Older Adults in Ontario

The Diagnostic Gap in Older Adults

An estimated 80% of autistic adults over 50 are undiagnosed, according to a 2020 analysis by Happé and Charlton. Many have spent decades with misdiagnoses (personality disorders, anxiety disorders, treatment-resistant depression) or no diagnosis at all. Late diagnosis can be transformative — providing an explanatory framework for lifelong differences and access to targeted supports.

Adult autism diagnosis in Ontario is available through a limited number of specialists. The Geneva Centre for Autism, York University's Autism Research Centre, and several private psychologists offer adult assessment. Wait times are typically 12-24 months for publicly supported assessment. The assessment process for older adults must account for decades of compensatory strategies (masking) that can obscure autistic traits on standard instruments.

Health and Aging Considerations

Autistic adults face elevated rates of several chronic health conditions: cardiovascular disease, diabetes, autoimmune conditions, gastrointestinal disorders, and neurological conditions. A large population study by Croen et al. (2015) found that autistic adults had significantly higher rates of nearly all medical conditions studied compared to non-autistic peers, even after controlling for co-occurring intellectual disability.

Healthcare access barriers include sensory challenges in medical settings (bright lights, loud waiting rooms, physical examination discomfort), communication difficulties that affect symptom reporting, and physicians' lack of training in autism in adults. Many autistic older adults have learned to avoid medical care, leading to delayed diagnosis of treatable conditions.

Ontario's aging services system — including Community Care Access Centres (now Home and Community Care Support Services), long-term care homes, and seniors' community programs — has minimal training in supporting autistic individuals. As the autistic population ages, these services will need significant adaptation.

Housing and Long-Term Planning

Housing is a critical concern for aging autistic adults. Those who have lived with aging parents face the "when parents can no longer provide care" crisis — often with no transition plan in place. Ontario's residential waitlists for adults with developmental disabilities average 8-10 years, and many autistic adults without intellectual disability do not qualify for developmental services housing.

Ontario housing options for aging autistic adults include: supportive housing through developmental services (if eligible), Ontario's affordable housing waitlist (average 7-12 year wait), supportive housing through mental health programs, co-housing and intentional community initiatives, and private supported living arrangements funded through Henson Trusts or RDSP withdrawals.