Is anxiety common in ADHD and Autism?

By Matthew Hallam, Registered Psychologist (AHPRA PSY0002471369). 5 min read. Published 13 May 2026. Last reviewed 13 May 2026. Next review 13 May 2027.

Yes. Anxiety occurs at substantially higher rates in autistic and ADHD populations than in the general population, and the direction is consistent across studies even when the exact numbers vary. The more useful question is why, and what that implies for how the anxiety gets understood and approached. The standard frame treats anxiety in autistic or ADHD adults as a separate condition that happens to sit alongside the neurodivergent profile. That frame is part of the picture. It is not the whole picture, and treating it as the whole picture is part of why anxiety in autistic and ADHD adults sometimes proves harder to shift than expected.

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How common is it

The prevalence figures depend on the population studied and the way anxiety is measured, but the broad picture is consistent across reviews. In autistic adults, anxiety symptoms and disorders occur at rates substantially higher than the general population, with recent reviews placing prevalence at around two to three times the general-population rate. A recent meta-analysis found that even at the subclinical level, higher autistic traits are associated with elevated anxiety symptoms, consistent with a dimensional understanding of how autism shows up across the adult population (Torices Callejo, Herrero, & Pérez Nieto, 2025).

In ADHD adults, the comorbidity picture is broad. Recent reviews report that the majority of adults with ADHD experience at least one comorbid psychiatric condition over their lifetime, with anxiety disorders among the most common (Wang et al., 2025). The diagnostic categories used in this comparison come from the standard manuals used across Australian mental health practice (American Psychiatric Association, 2022).

Why the rates are higher

The mechanisms behind these elevated rates are multiple, and they pull in different directions depending on the framework being applied.

The standard medical framework treats anxiety in an autistic or ADHD adult as a comorbidity. Two separable conditions, present in the same person, each requiring its own attention. This framework has clinical utility, particularly for organising treatment decisions and accessing services.

The mechanism-level picture is more layered. For autistic adults, several specific factors are repeatedly implicated. Masking, the effortful suppression of natural autistic ways of being in order to appear neurotypical, is associated with higher anxiety, both in the moment and cumulatively across years. Sensory hypersensitivity, where ordinary environmental input is experienced as overwhelming, produces a sustained activation that has the texture of anxiety. Uncertainty in social situations, where the implicit rules are not always transparent and the consequences of getting them wrong have accumulated over years, produces anticipatory anxiety that is well-founded rather than irrational.

For ADHD adults, the mechanisms include emotional regulation differences, executive function load, and the accumulated experience of being out of step with environments built for sustained linear attention. Many ADHD adults describe a background sense of being behind, of having dropped things, of needing to catch up, a state that has anxiety baked into it. Recent reviews of the ADHD-anxiety overlap describe contributions from shared neurobiology, executive function involvement, and the cumulative consequences of navigating school, work, and relationships with ADHD wiring (Wang et al., 2025).

This is part of why the reframe matters. The anxiety in autistic and ADHD adults is not all surplus pathology. Much of it is a predictable response to specific load. Treating the anxiety without recognising the load is part of why some autistic and ADHD adults find that standard anxiety treatment helps less than they expected.

What this distinction is for

The point of separating intrinsic features from load-driven anxiety is not to deny that there is anxiety. It is to make the work more accurate.

Anxiety work that targets the worry pattern or the avoidance pattern, without recognising the neurodivergent context, can still help, but it tends to underperform what the literature would predict, and it can be experienced as missing the point. Standard anxiety treatment doesn't, on its own, reduce sensory overload, reduce the cost of masking, or reduce executive function load.

Anxiety work that takes the neurodivergent profile as central often goes differently. The reduction of masking, where possible. The active management of sensory environments. The recognition that a particular pattern of avoidance may be reasonable accommodation rather than something to dismantle. The reframing of internalised judgements built up over years of being told you were too much, too sensitive, too disorganised.

Things you might notice, once you have this frame: that your anxiety doesn't reduce as much from standard anxiety work as you expected. That it reduces when the load reduces, in a way that doesn't always map onto the standard therapy logic. That a lot of what felt like anxiety has been the cumulative weight of operating in environments that haven't been built for your wiring. These observations are not a treatment plan. They are a way of noticing what your anxiety has been doing, and what it has been responding to.

Anxiety in autistic and ADHD adults is common. Some of it is intrinsic to the neurology. Much of it is the predictable response to navigating environments not built for the wiring. This is a frame to think with, not a verdict to apply. Hold it lightly. If it helps you describe what your anxiety has been doing, to yourself or to someone else, it has done its job.

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