Population with a disability, explained

What it measures

The disability share is the percentage of the civilian non-institutionalized population that reports any of six disability types: hearing difficulty, vision difficulty, cognitive difficulty, ambulatory (mobility) difficulty, self-care difficulty, or independent-living difficulty. A person is counted as "with a disability" if they report at least one of these six; the metric is a binary count, not a weighted severity score.

The Census definition is intentionally functional rather than medical, it asks about difficulty performing activities of daily living rather than about diagnosed conditions. This means it captures both permanent and temporary functional limitations and includes both severe disabilities and milder ones.

Why it matters

Disability data drives ADA compliance planning, transportation accessibility design, Medicare and Medicaid demand projections, vocational rehabilitation funding, and a wide range of municipal services. The metric is also a key input to federal funding formulas for disability-related programs. Local governments use disability share to estimate paratransit demand and to plan for accessible-housing supply.

How the Census measures it

ACS Table B18101, Sex by Age by Disability Status. The Census Bureau asks six questions about specific functional difficulties; a respondent is counted as "with a disability" if they answer yes to any of the six. CensusEasy uses the count with-a-disability divided by the civilian non-institutionalized population.

How to read the numbers

The US disability share is about 13%. State rates range from about 9% (Utah, Colorado, New Jersey) to over 20% (West Virginia, Mississippi, Kentucky, Arkansas). Among metros, the highest rates are in Appalachian and rural Southern metros where occupational disability (from mining, manufacturing, agricultural labor) plus an older age structure combine. The lowest are in young, college-educated coastal metros. A metro disability share above 18% usually reflects an older population, a history of disabling occupations, or both.

Caveats and limitations

Disability is self-reported and definitions vary by individual; respondents may answer the same set of questions differently depending on how they interpret "difficulty." The Census disability framework is also functional rather than diagnostic, which means it does not align with the ADA definition (which is broader in some ways and narrower in others) or the SSA definition (which is tied to ability to work).