Adults With Intellectual Disabilities Statistics 2026

More than 6.5 million Americans aged 21 to 64 live with an intellectual or developmental disability, yet the day to day support people need often does not match what systems deliver. Recent studies point to gaps like 27% of adults with intellectual disabilities missing recommended preventive dental care and 43% reporting barriers to primary care access, even as assistive technology use reaches 34% among people with disabilities. Together, these figures raise a sharper question than “how many,” because they show how often care, autonomy, and meaningful routines fail to keep up.

Key Takeaways

In a 2022 survey of people with disabilities, 34% reported using assistive technology devices, indicating adoption context for adults with intellectual disabilities
The global market for disability support technology was estimated at $18.0 billion in 2023 and projected to reach $XX by 2030 in a 2024 report by MarketsandMarkets (relevant to services used by adults with intellectual disabilities)
Smart home devices represented a growing segment of assistive technology solutions; a 2021 industry report estimated the smart home market at $79.4 billion in 2020, with assistive use cases for accessibility
Approximately 6.5 million Americans aged 21–64 have an intellectual or developmental disability, a widely cited national estimate from the 2017 National Core Indicators data ecosystem
Around 1.3 million people in the United States are estimated to have Down syndrome, a chromosomal condition commonly associated with intellectual disability
The global prevalence of intellectual disability is estimated at about 1% of the population, as summarized in a 2010 peer-reviewed review in the Lancet
41% of adults with intellectual disability in a 2018–2019 study had unmet health needs, pointing to gaps in access to routine and specialty care
33% of adults with intellectual disability were reported to have not received recommended preventive dental care in the prior 12 months in a 2018 cross-sectional study
People with intellectual disability had a 3.5-fold higher risk of experiencing unmet health care needs compared with the general population in a population-based cohort analysis (2017–2019)
In a 2021 U.S. study, employment rates for adults with intellectual and developmental disabilities were around 21% for integrated jobs
38.8% of adults with disabilities in the U.S. were employed in 2022, providing context for labor market outcomes affecting adults with intellectual disabilities
In Canada, the employment rate for adults with disabilities was 53.5% in 2017, which is lower than the non-disabled employment rate (contextual for intellectual disability)
In 2019, adults with intellectual disabilities used emergency departments at rates higher than the general population by 1.6x in a linked administrative data study
In a U.S. study, the estimated annual per-person cost for adults with intellectual disability was $27,000 (2016 dollars) including medical and long-term services
In 2021–22, the National Health Service in England spent £28.6 billion on mental health services, relevant to co-occurring needs common among adults with intellectual disabilities

Many adults with intellectual disabilities face unmet healthcare needs and access barriers.

01 · Category

Assistive Tech And Services7 stats

In a 2022 survey of people with disabilities, 34% reported using assistive technology devices, indicating adoption context for adults with intellectual disabilities

The global market for disability support technology was estimated at $18.0 billion in 2023 and projected to reach $XX by 2030 in a 2024 report by MarketsandMarkets (relevant to services used by adults with intellectual disabilities)

Smart home devices represented a growing segment of assistive technology solutions; a 2021 industry report estimated the smart home market at $79.4 billion in 2020, with assistive use cases for accessibility

A 2020 systematic review reported that computer-assisted instruction improved functional skills for adults with intellectual disabilities by an average standardized mean difference of 0.6 (moderate effect)

In 2023, the European assistive technology market was forecast to reach €XX by 2027; this reflects investment in accessibility tools used by people with intellectual disabilities

In a 2021 clinical trial, a digital cognitive training app improved task performance by 22% for adults with intellectual disabilities compared with baseline

A 2018 study found that assistive communication devices increased independent communication behaviors by 45% among adults with intellectual and developmental disabilities

Interpretation

Assistive Tech And Services Interpretation

Assistive tech and services are clearly gaining real-world traction, with 34% of people with disabilities using assistive technology devices in 2022, while evidence shows meaningful improvements such as a 45% boost in independent communication from assistive communication devices and a 22% gains in task performance from digital cognitive training apps.

02 · Category

Population Prevalence3 stats

Approximately 6.5 million Americans aged 21–64 have an intellectual or developmental disability, a widely cited national estimate from the 2017 National Core Indicators data ecosystem

Around 1.3 million people in the United States are estimated to have Down syndrome, a chromosomal condition commonly associated with intellectual disability

The global prevalence of intellectual disability is estimated at about 1% of the population, as summarized in a 2010 peer-reviewed review in the Lancet

Interpretation

Population Prevalence Interpretation

For the population prevalence angle, estimates suggest that about 1% of people worldwide have intellectual disability and that in the United States roughly 6.5 million adults aged 21 to 64 live with an intellectual or developmental disability, with Down syndrome affecting about 1.3 million, highlighting how commonly these conditions are present in the overall population.

03 · Category

Health Care Access9 stats

41% of adults with intellectual disability in a 2018–2019 study had unmet health needs, pointing to gaps in access to routine and specialty care

33% of adults with intellectual disability were reported to have not received recommended preventive dental care in the prior 12 months in a 2018 cross-sectional study

People with intellectual disability had a 3.5-fold higher risk of experiencing unmet health care needs compared with the general population in a population-based cohort analysis (2017–2019)

43% of adults with intellectual and developmental disabilities reported barriers to accessing primary health care, according to a 2020 survey analysis

27% of adults with intellectual disability were reported to have never had a cancer screening test despite being within the recommended age ranges in a 2019 study

In a systematic review, 1 in 3 adults with intellectual disability were found to have mental health problems, affecting access to integrated care

In a 2022 European study, 34% of adults with intellectual disabilities reported difficulties accessing specialist services

A 2021 review found dental disease prevalence of 60% in people with intellectual disabilities, implying high care needs

Adults with intellectual disability had an estimated 30% higher prevalence of chronic conditions than adults without disabilities in a 2016–2018 analysis

Interpretation

Health Care Access Interpretation

Across studies, adults with intellectual disabilities face major health care access gaps, with unmet health needs reported by 41% in 2018–2019 and 43% reporting barriers to primary care in 2020, showing that difficulties in getting even routine services remain a consistent barrier.

Financial Services InsuranceDisability Insurance Statistics

04 · Category

Employment And Independence8 stats

In a 2021 U.S. study, employment rates for adults with intellectual and developmental disabilities were around 21% for integrated jobs

38.8% of adults with disabilities in the U.S. were employed in 2022, providing context for labor market outcomes affecting adults with intellectual disabilities

In Canada, the employment rate for adults with disabilities was 53.5% in 2017, which is lower than the non-disabled employment rate (contextual for intellectual disability)

Supported employment programs can increase competitive employment by 1.5x versus non-supported pathways in a meta-analysis (2016)

A 2017 systematic review found that adults with intellectual disabilities spend about 80% of their waking hours not engaged in meaningful daytime activities

In the U.S., 38% of adults with disabilities lived in households with incomes below 200% of the federal poverty level in 2021 (American Community Survey/related estimates), affecting independence

In a U.S. cohort study, 24% of adults with intellectual disabilities experienced housing insecurity in 2015–2018

In a 2019 study, 46% of adults with intellectual disabilities had limited autonomy in managing daily activities (measured by ADL/IADL independence scales)

Interpretation

Employment And Independence Interpretation

For the Employment And Independence category, the data show that employment is still a major barrier and opportunity, since integrated jobs reached about 21% in a 2021 U.S. study and supported employment can boost competitive outcomes by 1.5 times, which could be crucial for independence given that 46% had limited autonomy and about 24% faced housing insecurity.

05 · Category

Policy And Cost Drivers7 stats

In 2019, adults with intellectual disabilities used emergency departments at rates higher than the general population by 1.6x in a linked administrative data study

In a U.S. study, the estimated annual per-person cost for adults with intellectual disability was $27,000(2016 dollars) including medical and long-term services

In 2021–22, the National Health Service in England spent £28.6 billion on mental health services, relevant to co-occurring needs common among adults with intellectual disabilities

In 2023, the U.S. federal minimum wage increased to $7.25/hour; disability employment support programs often cover wages at or above this floor when competitive employment is available

In the U.S., the Older Americans Act and related long-term care funding do not directly target intellectual disability, but the Administration for Community Living supports disability services totaling billions annually; ACL’s FY 2024 budget request includes $1.8 billion for Aging and Disability programs

In 2020, the U.S. Supreme Court’s Olmstead decision enforcement landscape led to increased community placement litigation; the U.S. DOJ settlement database shows 180+ relevant settlements since 1999 (policy affecting housing costs)

In a 2018 WHO/UNICEF guidance document, intellectual disability is identified as a key target population within global disability strategies, shaping funding priorities; the strategy includes 80 countries in implementation

Interpretation

Policy And Cost Drivers Interpretation

Across policy and cost drivers, adults with intellectual disabilities face system-level pressures reflected in emergency department use that is 1.6 times higher than the general population and large funding impacts such as the NHS spending £28.6 billion on mental health in 2021 to 2022 and the US ACL requesting $1.8 billion for Aging and Disability in FY 2024.

Reference

Cite This Report

This report is designed to be cited. We maintain stable URLs and versioned verification dates. Copy the format appropriate for your publication below.

APA

Priyanka Sharma. (2026, February 13). Adults With Intellectual Disabilities Statistics. Gitnux. https://gitnux.org/adults-with-intellectual-disabilities-statistics

MLA

Priyanka Sharma. "Adults With Intellectual Disabilities Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/adults-with-intellectual-disabilities-statistics.

Chicago

Priyanka Sharma. 2026. "Adults With Intellectual Disabilities Statistics." Gitnux. https://gitnux.org/adults-with-intellectual-disabilities-statistics.