There is no single census count of transgender people in the United States. Researchers have produced different estimates because studies ask different questions, use different samples and include people who may not disclose a gender identity in every setting.
What can be measured?
Studies may count people who identify as transgender, people who report gender dysphoria, people who have socially transitioned, or people who have sought medical or counseling services. Other studies count particular forms of care. Each measure describes a different group.
- Self-identification in a population survey.
- Reported gender dysphoria or related clinical contact.
- Social transition or use of a different gender identity in daily life.
- Requests for, or receipt of, hormone care or other gender-affirming treatment.
- People who have pursued or received gender-affirming surgery.
Medical-care counts are especially narrow: many transgender people do not seek surgery, cannot access it, or do not consider it part of their transition. A surgical count therefore cannot stand for the whole transgender population.
Why older estimates were lower
Early prevalence studies often relied on specialist clinics and formal diagnoses. Those sources could miss people who had not approached a clinic, feared disclosure, lacked access to care, or used language other than the terms used by researchers. Changes in terminology and social conditions also make direct comparisons across decades difficult.
Selected research estimates
The following examples illustrate how estimates developed. They are retained as historical context and should not be read as a single, definitive answer.
| Study or source | Reported estimate | What it measured |
|---|---|---|
| Walinder, 1960s | Low clinic-based ratios for people described as transsexual | Specialist contacts in an era when treatment and terminology were limited. |
| Wilson and colleagues, Scotland, 1999 | About 1 in 12,200 patients over age 15 | Patients with gender dysphoria known to general practices. |
| Gates, Williams Institute, 2011 | About 0.3% of U.S. adults | Adults identifying as transgender in reviewed survey data. |
| Flores and colleagues, Williams Institute, 2016 | About 0.6% of U.S. adults; approximately 1.4 million adults | Adults identifying as transgender in pooled state-level survey data. |
The estimates above come from the historical sources listed in the original essay. Survey instruments, samples and terminology have changed since these publications, so newer research may produce different results.
How surveys affect the result
People may answer differently depending on whether a questionnaire is anonymous, whether it offers inclusive response options, and whether respondents trust the organization collecting the data. Age, sampling method, question wording and the treatment of missing answers can all affect the estimate.
Researchers also distinguish between an estimate of adults and an estimate of the entire population. A result for adults cannot automatically be applied to children or converted into a national total without appropriate population data.
Interpreting the numbers responsibly
A higher estimate does not necessarily mean that the underlying population suddenly appeared. It may reflect better sampling, broader definitions, improved privacy, changing language, greater willingness to disclose, or wider access to information and care. Conversely, a lower estimate may reflect underreporting rather than fewer transgender people.
References and further reading
- J. Walinder, Transsexualism: Definition, prevalence and sex distribution, 1968.
- P. Wilson and colleagues, The prevalence of gender dysphoria in Scotland: a primary care study, 1999.
- F. Olyslager and L. Conway, analyses of historical prevalence estimates, 2000s.
- Gary J. Gates, How many people are lesbian, gay, bisexual, and transgender?, Williams Institute, 2011.
- Andrew R. Flores and colleagues, How many adults identify as transgender in the United States?, Williams Institute, 2016.
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