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What percentage of American adults have asthma right now?

8.5% of American adults have asthma right now — about 9 in every 100, or 1 in 10. That is the figure published by the National Health Interview Survey for 2025.

Where this number comes from

Survey

National Health Interview Survey

What it measured

Respondents were asked if they had ever been told by a doctor or other health professional that they had asthma. Respondents who had been told they had asthma were asked if they still had asthma.

Population

U.S. adults aged 18 and over

Year

2025

95% confidence interval

8% to 8.9%

Work of the U.S. federal government - public domain. See the source data

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