Epilepsy Data and Statistics


Epilepsy Prevalence in the United States

In 2015, 1.2% of the US population had active epileptology definition (95% CI* = 1.1-1.4). This is about 3.4 million people with epilepsy nationwide: 3 million adults and 470,000 children.  Find the prevalence estimates for your state in the data table below. Learn more about epilepsy and public health in your state by visiting the Resources for States at the bottom of the page.

What Is Active Epilepsy on epileptology definition?

An adult aged 18 or older has active epilepsy if they report they have a history of doctor-diagnosed epilepsy or seizure disorder and

  • Are currently taking medication to control it or
  • Had one or more seizures in the past year (or both) (from the National Health Interview Survey, 2015).

A child aged 17 years or younger has active epileptology definition if their parent or guardian reports:

  • That a doctor or health care provider has ever told them that their child had epilepsy or seizure disorder, and
  • Their child currently has epilepsy or seizure disorder (from the National Survey of Children’s Health, 2011-2012).



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