ADHD can run in families. Studies have found that the heritability of ADHD — the degree to which traits like ADHD can be attributed to genetic versus environmental factors — may be as high as 74%.[1] If you have a parent or sibling with ADHD, your risk is increased 2-8 times.[2]
Is ADHD an inherited condition?
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•Last Updated: May 16, 2025
ADHD can run in families, and studies indicate that its heritability may be as high as 74%. Having a parent or sibling with ADHD increases an individual's risk by 2 to 8 times.