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How Many Adults Are AuDHD? 

PostedSeptember 17, 2025
UpdatedSeptember 17, 2025
ByMy Patient Advice

Adult AuDHD prevalence is a topic of growing interest, as more adults are being recognised with both ADHD and autism. While autism and ADHD are often diagnosed in childhood, many neurodivergent adults may have gone undiagnosed or misdiagnosed in earlier years. As awareness increases, it is becoming clearer that the prevalence of Adult ADHD autism is higher than previously thought, with studies suggesting that a significant portion of adults with autism also show symptoms of ADHD. 

Recent research indicates that Adult AuDHD prevalence could be as high as 30-50%, though this figure may vary due to underdiagnosis, especially in women, where symptoms may present differently. Understanding the intersection of these two conditions in adults is crucial for providing appropriate treatment and support to those who have long lived with undiagnosed symptoms. 

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Understanding the Prevalence and Impact 

This is how the Adult AuDHD prevalence is understood and its impact on the lives of neurodivergent adults. 

Adult ADHD Autism Overlap:  

Many neurodivergent adults with ADHD and autism often struggle with both attentional control and social communication issues, which can significantly impact daily functioning. However, these symptoms may have been attributed to other causes in the past, leading to a delay in proper diagnosis and treatment. 

Challenges in Diagnosis:  

Adults with AuDHD often experience difficulties navigating both work and personal life due to the overlapping symptoms of ADHD and autism. These challenges are compounded by the fact that ADHD may be overlooked in individuals with autism, and vice versa. A comprehensive dual diagnosis is critical for offering effective treatment options. 

Visit providers like ADHD Certify for personal consultations to gain a better understanding of how a dual diagnosis can impact your life and receive tailored support for managing both conditions.

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Autism Spectrum Disorder.

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Victoria Rowe, MSc, author for my patient advice - mypatientadvice.co.uk

Victoria Rowe, MSc

Author

Victoria Rowe is a health psychologist with a Master’s in Health Psychology and a BS in Applied Psychology. She has experience as a school psychologist, conducting behavioural assessments, developing individualized education plans (IEPs), and supporting children’s mental health. Dr. Rowe has contributed to peer-reviewed research on mental health, including studies on anxiety disorders and the impact of COVID-19 on healthcare systems. Skilled in SPSS, Minitab, and academic writing, she is committed to advancing psychological knowledge and promoting well-being through evidence-based practice.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy. 

Dr. Rebecca Fernandez, MBBS, author and a reviewer for my patient advice - mypatientadvice.co.uk

Dr. Rebecca Fernandez, MBBS

Reviewer

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy. 

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