AuDHD, Autism, ADHD and the LGBTQI+ Community: What the Research Actually Shows
Curiosity sparked this one. Pride Month got me thinking about something I had noticed anecdotally for years but never actually sat down and researched properly: just how many people in the AuDHD and autistic community also identify somewhere on the LGBTQI+ spectrum. Not a passing thought, a genuine pattern, one that seemed too consistent to be coincidence.
So I went looking for the evidence. Not opinion pieces, not think pieces, the actual peer reviewed research. What sexual orientation and gender identity data exists for autistic people and ADHDers, how strong is it, and where are the gaps.
What I found surprised me in places and confirmed what a lot of us already suspected in others. This is what the research actually says.
Are autistic people and ADHDers more likely to be LGBTQI+?
Yes. Every large study on this topic points the same way. Autistic people report non-heterosexual orientations at more than double the rate of non-autistic people (George & Stokes, 2018). Transgender and gender-diverse adults are three to six times more likely to be autistic than cisgender adults (Warrier et al., 2020). The research on ADHD specifically is thinner, but what exists shows a similar pattern of higher rates of bisexual identity and same-sex sexual experience among adults with ADHD compared with adults without it (Hertz et al., 2022).
None of this is new to anyone in the AuDHD community. Most of us could have told you this from our group chats years before a single paper confirmed it. What has changed is that the data now backs up the lived experience, and that matters, because data is what gets a topic taken seriously in a boardroom, a clinic, or a policy document.
This piece pulls together what the peer reviewed research currently says about the overlap between autism, ADHD and LGBTQI+ identity, where the evidence is strong, where it is thin, and what both individuals and organisations can do with that information.
For organisations:* If a member of your team is autistic, ADHD, or both, the probability that they are also LGBTQI+ is meaningfully higher than in the general population. This is not a reason to ask about anyone’s identity. It is a reason to make sure your inclusion policies are built wide enough to hold more than one identity at once, because for a lot of your neurodivergent staff, they already do.
How common is it for autistic people to identify as LGBTQI+?
George and Stokes (2018) surveyed 309 autistic adults and 310 non-autistic adults using the Sell Scale of Sexual Orientation. In the autistic group, 69.7 percent reported a non-heterosexual orientation, compared with 30.3 percent in the non-autistic comparison group. The autistic group reported higher rates of homosexuality, bisexuality and asexuality, and lower rates of exclusive heterosexuality.
Weir, Allison and Baron-Cohen (2021) followed this up with a larger study looking at the sexual health, orientation and activity of autistic adolescents and adults. Their findings held the same direction. Autistic people, and autistic women in particular, were more likely to report asexuality, lower sexual desire, and non-heterosexual attraction than non-autistic comparison groups. The authors were direct about why this matters beyond the numbers. They wrote that the intersection of autism and LGBTQA+ identity is associated with worse mental health, worse overall health, and disparities in healthcare access, and pointed to minority stress and institutionalised marginalisation as likely drivers.
A pattern this consistent, replicated across different research teams, different countries and different measurement tools, is not something you can wave away as sampling bias. Autistic people are simply more likely to be something other than exclusively heterosexual, and the research community has stopped debating whether this is true and moved on to asking why.
For organisations:* Sexual orientation diversity within your autistic and ADHD staff is likely to be higher than within your non-neurodivergent staff. If your diversity and inclusion training treats neurodivergence and LGBTQI+ identity as separate boxes on a form, you are missing a large group of people who sit inside both boxes at once, and whose experience of your workplace is shaped by the combination, not by either identity alone.
Why are autistic people more likely to be transgender or gender diverse?
The single largest study on this question comes from Warrier et al. (2020) at the University of Cambridge’s Autism Research Centre. Using five independently recruited datasets totalling 641,860 participants, the researchers found that transgender and gender-diverse individuals were three to six times more likely to be autistic than cisgender individuals, after controlling for age and educational attainment.
What makes this study particularly useful is that it did not stop at diagnosis rates. The team also measured autistic traits directly, using self-report tools, in people who had never been formally diagnosed. Transgender and gender-diverse participants scored higher on autistic traits than cisgender participants regardless of whether they held an autism diagnosis. This tells us the overlap is not simply an artefact of who gets diagnosed. It shows up at the level of traits themselves.
Kallitsounaki and Williams (2022) reviewed the literature in the other direction, looking at how much autism turns up in people with gender dysphoria or gender incongruence. Their meta-analysis found a pooled prevalence estimate of 11 percent, meaning roughly one in nine people with clinically significant gender dysphoria or incongruence were autistic. The authors were careful to flag that the prediction intervals around this figure were wide, because studies in this space use very different assessment tools and cut-offs, but the direction of the relationship was consistent and statistically significant.
Neither of these studies tells us why the relationship exists, and it is worth being honest about that rather than filling the gap with a tidy explanation. Warrier and colleagues offered a few hypotheses in their discussion, including the idea that autistic people may feel less bound by social expectations around gender norms, which could make them more likely to recognise and act on a gender identity that differs from what they were assigned at birth. This remains a hypothesis, not a settled finding.
For organisations:* Gender diverse and transgender employees in your organisation are statistically more likely to be autistic than your cisgender employees, and this relationship holds regardless of whether someone has a formal diagnosis. Facilities policy, name and pronoun processes, and health benefits that only account for one of these identities at a time will fail a meaningful proportion of the people they are meant to support.
What does the research say about autism and asexuality?
Asexuality shows up consistently as part of the autism and sexual orientation picture, not as a separate finding. George and Stokes (2018) found higher rates of asexuality among autistic participants compared with non-autistic participants, alongside higher rates of homosexuality and bisexuality. Weir, Allison and Baron-Cohen (2021) found the same pattern, with autistic women reporting particularly high rates of low sexual desire and asexual identification compared with autistic men and with non-autistic comparison groups.
This is worth naming clearly because asexuality is frequently left out of conversations about autism and LGBTQI+ identity, even though the research keeps returning to it. An autistic person who identifies as asexual is not choosing a lesser or incomplete version of queerness. The data suggests this is simply one of the more common ways sexual orientation diversity shows up in the autistic population, alongside bisexuality and homosexuality.
For organisations:* Asexual and aromantic staff are part of your LGBTQI+ population, and the research suggests this identity is disproportionately represented among your autistic staff specifically. Employee resource groups and wellbeing initiatives that frame LGBTQI+ inclusion purely around romantic partnership or coming out narratives can end up quietly excluding this group.
Is there research on ADHD and LGBTQI+ identity specifically?
There is, but it is considerably thinner than the autism research, and this is a genuine gap rather than a reflection of ADHD and LGBTQI+ identity being unrelated.
Hertz et al. (2022) surveyed 206 adults, 139 with ADHD and 76 without, about their sexual behaviour and experiences. Compared with the non-ADHD group, adults with ADHD reported significantly more hypersexual behaviour. The study also found that while both groups reported heterosexuality most frequently, individuals with ADHD were clearly more likely to identify as bisexual, and significantly more adults with ADHD reported previous same-sex sexual experiences than adults without ADHD.
This is a single study with a modest sample size, and the authors themselves describe their findings as exploratory. It is not the kind of large, replicated evidence base that exists for autism and gender diversity. What it does show is a direction consistent with the broader neurodivergent and LGBTQI+ overlap, and it flags ADHD as an area where far more research is needed before anyone should be citing firm prevalence figures.
Given that AuDHD describes the co-occurrence of autism and ADHD, and most of the strong evidence in this space comes from autism-specific samples, it is worth being upfront that we do not yet know how much of the AuDHD and LGBTQI+ overlap is being driven by the autism side of the profile, the ADHD side, or genuinely by the combination of both. Anyone telling you this is settled science is getting ahead of the evidence.
For organisations:* Do not assume the strength of the autism and LGBTQI+ research applies equally to ADHD. It points the same direction, but the evidence base is much smaller. Build your policies to be inclusive of the whole AuDHD and broader neurodivergent population rather than basing them on autism-specific statistics alone.
What happens to mental health when neurodivergent and LGBTQI+ identity overlap?
Mental health outcomes get worse, and the research suggests the two identities do not simply add together, they compound.
Kung (2024) studied transgender and non-binary adults and looked at the relative contribution of autistic traits and gender minority stress to mental health outcomes. After accounting for gender minority stress on its own, autistic traits still explained additional variance in suicidality across gender minority groups, in anxiety symptoms among non-binary participants, and across all measured mental health outcomes among non-binary people assigned female at birth. In plain terms, being autistic added measurable risk on top of the risk already carried by gender minority stress, rather than being absorbed into it.
The Trevor Project (2022) reported a similar pattern in a large research brief on autistic LGBTQ youth. LGBTQ youth who had been diagnosed with autism had over 50 percent greater odds of attempting suicide in the past year compared with LGBTQ youth who had never received an autism diagnosis. The brief situated this within the minority stress model first described by Meyer (2003), which explains poor mental health outcomes in stigmatised groups as a consequence of navigating a world that treats their identity as a problem to be managed, rather than as a consequence of the identity itself.
This distinction matters enormously for how this topic gets talked about. The elevated mental health risk in autistic LGBTQI+ people is not evidence that being autistic and LGBTQI+ is inherently harder to live with. It is evidence that navigating two forms of marginalisation inside systems, workplaces and healthcare pathways that were not designed with either group in mind takes a measurable toll.
For organisations:* If your psychological safety and wellbeing frameworks treat neurodivergent inclusion and LGBTQI+ inclusion as parallel but separate initiatives, you are likely underestimating the mental health risk carried by staff who sit at the intersection of both. Minority stress compounds. Your support structures need to be built to hold that, not just each identity in isolation.
Why do autistic LGBTQI+ people face worse healthcare outcomes?
Wallisch et al. (2023) directly tested this question using data from the 2019 National Survey on Health and Disability, comparing 62 LGBTQ+ autistic adults with 58 straight and cisgender autistic adults. The intersection of an LGBTQ+ identity and autism was associated with greater disparities in physical and mental health and higher rates of unmet healthcare needs than being autistic alone.
The same study found something genuinely useful for advocacy and policy conversations. State level policies that prohibited discrimination against LGBTQ+ people acted as a protective factor, associated with fewer unmet healthcare needs among autistic LGBTQ+ adults. In other words, structural protection measurably reduced harm. This is not a small finding. It means the disparity is not fixed or inevitable, it responds to the policy environment around it.
This lines up with what autistic LGBTQI+ adults have been describing anecdotally for years. Healthcare providers who are not trained to recognise autism can miss it entirely in adults who have spent years masking. Providers who are not LGBTQI+ competent can create an environment where disclosure feels unsafe. When both gaps exist in the same appointment, the person in the room is left explaining two entire aspects of themselves to a system that was not built to hear either.
For organisations:* If you offer health benefits, an employee assistance programme, or any internal wellbeing support, ask whether the providers you contract with have training in both autism and LGBTQI+ competent care, not just one or the other. A provider who is excellent with autistic clients but has no LGBTQI+ training, or the reverse, will still fail a meaningful number of your AuDHD staff.
What are the gaps in this research, honestly?
There are several, and naming them properly is part of taking this topic seriously rather than turning it into a tidy narrative that the evidence does not fully support.
The ADHD specific evidence base is thin. Almost everything strong in this article comes from autism research, either autism alone or autism combined with ADHD. Hertz et al. (2022) is a useful start, but it is one study with 206 participants. Anyone presenting ADHD and LGBTQI+ prevalence figures with the same confidence as the autism figures is overstating what currently exists.
The samples are heavily weighted toward adults in the United States and the United Kingdom, and mostly toward people who are university educated and English speaking. Warrier et al. (2020) drew on UK and international online cohorts. Wallisch et al. (2023) used US national survey data. No Aotearoa specific research on this intersection turned up during this research pass. That is a genuine gap, not a minor caveat, and any claims about how this plays out for autistic or ADHD LGBTQI+ people in Aotearoa specifically should be treated as extrapolation from overseas data until local research exists.
Directionality is unresolved. None of the studies referenced here establish why autism, ADHD and LGBTQI+ identity overlap as often as they do. Warrier et al. (2020) offer hypotheses involving reduced conformity to social norms, and other researchers have proposed shared neurodevelopmental or hormonal pathways, but these remain hypotheses being tested, not conclusions that have been reached.
Non-binary and transmasculine experiences are better represented in the current literature than transfeminine and intersex experiences within the autism research specifically. This is worth knowing if you are building content, policy or support resources from this evidence base, because the data underneath will reflect this same imbalance.
For organisations:* Treat every statistic in this piece, and every statistic you see elsewhere on this topic, as a snapshot of research that is still developing rather than a settled picture. Build policy that is flexible enough to be updated as the evidence grows, rather than policy anchored to a single prevalence figure that may shift as ADHD specific and Aotearoa specific research catches up.
How should we talk about this overlap without pathologising it?
Carefully, and with attention to the difference between describing a pattern and explaining it away as a symptom.
A lot of the older clinical literature on autism, ADHD and sexuality was written from a deficit framework, treating diversity in sexual orientation or gender identity among neurodivergent people as an odd side effect of a disorder, something to be noted in a case file rather than understood as a legitimate part of who someone is. The more recent research cited throughout this piece, particularly Warrier et al. (2020) and Weir et al. (2021), is careful to avoid this framing. They report the pattern, note that it is robust and worth investigating, and stop short of treating either identity as an explanation for the other.
That distinction matters for how this research gets used. Autism and ADHD are not causes of someone’s sexual orientation or gender identity. Being LGBTQI+ is not a symptom of neurodivergence, and being neurodivergent does not make someone’s LGBTQI+ identity less authentic or more likely to be a phase. What the data shows is co-occurrence, at rates too high and too consistent across independent studies to be coincidental, alongside a shared vulnerability to minority stress and marginalisation once both identities are in the room together. Holding those two facts at once, real co-occurrence and no causal explanation, is the intellectually honest position, and it is the one every credible study referenced here takes.
For organisations:* Avoid any internal messaging, training material, or wellbeing content that implies neurodivergence explains or causes LGBTQI+ identity, or the reverse. The research supports a documented overlap. It does not support a causal story in either direction, and treating it as though it does will misrepresent both the science and the people affected by it.
What does this mean if you are a late-diagnosed AuDHD adult who is also LGBTQI+?
It means the numbers back up something you may have already sensed about your own life. If you are autistic, ADHD, or both, and you also identify somewhere on the LGBTQI+ spectrum, you are not an unusual combination of traits. You are part of a well documented and consistently replicated pattern.
It also means the mental health load you may be carrying has an identifiable source, and it is not a personal failing. Kung (2024) and the Trevor Project (2022) both point to the same mechanism. Minority stress from navigating a world that was not built with your identity in mind compounds when you are holding more than one marginalised identity at once. That compounding effect is measurable in the data. It is not you being dramatic or fragile. It is a documented pattern in people whose lives look like yours.
For a lot of late-diagnosed AuDHD adults, discovering this research is validating in a specific way. Many of us spent years being told we were too much, too sensitive, too intense, or simply confusing to the people around us, often without anyone naming that we were autistic, ADHD, or both. Layer a non-heterosexual orientation or a gender identity that did not match expectations on top of that, and the confusion other people expressed about us was rarely about who we actually were. It was about how few of the systems around us had been built to recognise either part of our identity, let alone both at once.
For organisations:* Your AuDHD LGBTQI+ staff have likely spent years being read by others as confusing, difficult, or hard to categorise, often without any framework that explained why. Psychological safety for this group means building workplace culture that does not require people to explain or justify the combination of who they are before they can expect to be treated well.
The bottom line
Autistic people and ADHDers are more likely to be LGBTQI+ than the general population, and the evidence for this is strongest and most consistent around autism and gender diversity, and around autism and sexual orientation including asexuality (George & Stokes, 2018; Warrier et al., 2020; Weir et al., 2021). ADHD specific research exists but remains limited (Hertz et al., 2022). When neurodivergent identity and LGBTQI+ identity overlap, mental health risk does not simply average out between the two, it compounds (Kung, 2024; Trevor Project, 2022), and this compounding shows up clearly in healthcare access as well (Wallisch et al., 2023).
None of this is destiny. Wallisch et al. (2023) found that protective policy environments measurably reduced unmet healthcare needs for autistic LGBTQ+ adults. That is the clearest evidence in this entire body of research that the outcomes described here are shaped by the systems around neurodivergent LGBTQI+ people, not fixed facts about the people themselves.
References
George, R., & Stokes, M. A. (2018). Sexual orientation in autism spectrum disorder. Autism Research, 11(1), 133 to 141. https://doi.org/10.1002/aur.1892
Hertz, P. G., Turner, D., Barra, S., Biedermann, L., Retz-Junginger, P., Schöttle, D., & Retz, W. (2022). Sexuality in adults with ADHD: Results of an online survey. Frontiers in Psychiatry, 13, Article 868278. https://doi.org/10.3389/fpsyt.2022.868278
Kallitsounaki, A., & Williams, D. M. (2022). Autism spectrum disorder and gender dysphoria/incongruence: A systematic literature review and meta-analysis. Journal of Autism and Developmental Disorders, 53(8), 3103 to 3117. https://doi.org/10.1007/s10803-022-05517-y
Kung, K. T. F. (2024). Autistic traits, gender minority stress, and mental health in transgender and non-binary adults. Journal of Autism and Developmental Disorders, 54(4), 1389 to 1397. https://doi.org/10.1007/s10803-022-05875-7
Meyer, I. H. (2003). Prejudice, social stress, and mental health in lesbian, gay, and bisexual populations: Conceptual issues and research evidence. Psychological Bulletin, 129(5), 674 to 697.
The Trevor Project. (2022). Mental health among autistic LGBTQ youth. https://www.thetrevorproject.org/research-briefs/mental-health-among-autistic-lgbtq-youth-apr-2022/
Wallisch, A., Boyd, B. A., Hall, J. P., Kurth, N. K., Streed, C. G., Jr., Mulcahy, A., McMaughan, D. J., & Batza, K. (2023). Health care disparities among autistic LGBTQ+ people. Autism in Adulthood, 5(2), 165 to 174. https://doi.org/10.1089/aut.2022.0006
Warrier, V., Greenberg, D. M., Weir, E., Buckingham, C., Smith, P., Lai, M.-C., Allison, C., & Baron-Cohen, S. (2020). Elevated rates of autism, other neurodevelopmental and psychiatric diagnoses, and autistic traits in transgender and gender-diverse individuals. Nature Communications, 11, Article 3959. https://doi.org/10.1038/s41467-020-17794-1
Weir, E., Allison, C., & Baron-Cohen, S. (2021). The sexual health, orientation, and activity of autistic adolescents and adults. Autism Research, 14(11), 2342 to 2354. https://doi.org/10.1002/aur.2604
